Customer Ratings & Reviews
- Model:
- QN77S90DAFXZA
- SKU:
- 6578065
Rating by feature
- Picture Quality
Rating 4.7 out of 5 stars
- Sound Quality
Rating 4.4 out of 5 stars
- Brightness
Rating 4.7 out of 5 stars
Customers are saying
Customers find value in the TV's picture quality, color, OLED quality, viewing angle, and contrast. However, some customers have expressed concerns regarding the TV's reliability and power supply. A few customers have also noted the TV is heavy. Overall, the positive aspects of the TV seem to outweigh the negative ones.
This summary was generated by AI based on customer reviews.
- Cons mentioned:Power supply, Reliability
Died after 2 months. This model is a lemon
||Posted . Owned for 2 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.I have 5 Samsung TVs without issue so ignored the bad reviews for this model. Died right after my BB Plus 60 day return window. No Power. No Red Light. Replacement Power Board out of stock so nothing Samsung can do. Doesn’t matter if you have Geek Squad extended warranty. Within the first year must work through Samsung. Even offered to buy a more expensive TV just so I don’t need to deal with this unit that obviously has major issues (easy to find hundreds of similar complaints online). Best Buy was no help. When buying a $2,500 TV expect it to last more than 3 months. Really frustrating and disappointing with both Samsung and Best Buy
No, I would not recommend this to a friendBrand response from Samsung
Posted .DisappointedBestBuyMember,
It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Please give us the opportunity to assist you by contacting Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Pros mentioned:Picture quality
Samsung TV Dead in 2 Months – Quality Has Declined
||Posted . Owned for 2 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.I Just bought a home 3 months ago, and one thing I love to do is watch movies. When the TV was working, the picture quality was good. However, the responsiveness was very slow and clunky, and the UI wasn’t snappy, making it clear that the processing power on such a large TV was subpar. I’ve been a loyal Samsung TV customer for many years—since 2000. This was my first new TV purchase in about five years, and unfortunately, it might be my last from Samsung. I’ve read reviews about declining quality and cheaper components, but I hadn’t experienced it firsthand until now. I purchased this TV in November 2024, and by January 20, 2025, it’s completely dead—no power, no screen, nothing. It’s frustrating to see a once-reliable and quality brand fall off so hard. Samsung built its reputation on quality, but like Toyota, it seems they started cutting corners after reaching the top. Now, I’m stuck figuring out how to return this massive TV to the store. I may switch to LG or Sony next time—Samsung just isn’t what it used to be. And they may have lost a long-time customer who purchased more than 6 TVs from them.
No, I would not recommend this to a friendBrand response from Samsung
Posted .RickyShinobi,
It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Please give us the opportunity to assist you by contacting Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Cons mentioned:Reliability
Samsung 77” OLED TV died in first two weeks -
||Posted .This reviewer received promo considerations or sweepstakes entry for writing a review.This 77” Samsung OLED television stopped working suddenly and the screen went black and dead within two weeks of use. I purchased this television as a Christmas present for my children and was completely disappointed to levels incomprehensible- when it suddenly died while they were watching it. Afterwards I read reviews on the Samsung website and found out this exact television has numerous complaints reporting this exact problem - it simply dies after short usage. Will not ever purchase a Samsung ever again. I have to wait over 10 days for a Best Buy refund to my account before I can shop for a new - different brand television and I am angry and disgusted with both the store and the manufacturer. Good riddance to an awful television and I will definitely read the reviews BEFORE I make another purchase.
No, I would not recommend this to a friendBrand response from Samsung
Posted .JocelynD,
It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Please give us the opportunity to assist you by contacting Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Pros mentioned:Picture quality
Do NOT buy this!!!! Leaving a 1 star to warn you!
||Posted . Owned for 1 week when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.We bought this TV after doing what I thought was an appropriate amount of research on the best Quality for our money!!! I could not have been more wrong!!! We bought it on December 20 so we had the new TV for the holiday! We ended up not having a TV at all for the holiday!!! It stopped working on day 5, the stand by light would not even on!!! We called best buy and they told us that due to not being able to find our addreess we would have to return it to the closest store! Thos was over an hour away!!! When we arrived at the store we were the 3rd customer to retun the same TV that day!!!!! Do not waste your money!!!! We bought an LG that day and the Best Buy Employees in Bristol, Virginia could not have been better!!! The in store service was a 5 star!!!! I never write reviews but i am writing this one to keep you from making the same mistake that we made!!!
No, I would not recommend this to a friendBrand response from Samsung
Posted .Jessica21,
It’s unfortunate to hear of the issues that have caused you to return your S90D TV. Your experience is very important to us and will be shared with our product team.
Should you ever decide to give Samsung TVs another try and have questions or need help with settings, setup, or features, please know we’re here to help. Call us at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week.
LiveChat with an agent as well as manuals, software, and warranty info can be found at the ‘Support’ link on our Samsung website.
~ Samsung Specialist
- Cons mentioned:Power supply
Power Supply right at end of warranty!
||Posted . Owned for 8 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.Just like most of the reviews on here the power supply went out. Luckily it was about 2 weeks before end of warranty just like everyone else. Samsung and the local repair shop that's contacted with them both hate people and hate customer service so it's a blast dealing with threatening texts over the last few weeks from the repair shop saying they are going to cancel my appointment if I don't do whatever they want for the next two weeks. Bless you!
No, I would not recommend this to a friendBrand response from Samsung
Posted .dlowester,
We appreciate you sharing your experience with Samsung Support. Your input is invaluable in our continuous pursuit of delivering the best in product and customer experience, and we'll be sure to pass this along to our internal teams.
Should you ever have questions or need help with your TV, Samsung is here for you. Just give us a call at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Pro
- Cons mentioned:Reliability
Blacked out screen
||Posted . Owned for 3 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.Bought this tv on November 21st 2024. It is now February 22nd at approximately 10:14 my tv blacked out on me. Remote won’t work, unplugging and plugging it back in won’t work. It’s already plugged into the wall so it can’t be a power issue which I did check my outlet. And guess what, it ain’t the outlet. Just laid up watching tv and it made a weird power surge noise and blacked out. Apparently this issue is called “black screen of death.” Which is common for these tvs.
No, I would not recommend this to a friendBrand response from Samsung
Posted .Jaylen,
It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Please give us the opportunity to assist you by contacting Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Pros mentioned:Oled quality
TV won’t turn on
||Posted . Owned for 3 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.Purchased the TV on September 9th 2025, TV went off on December 22nd 2025 and won’t turn on again. TV is still under warranty so I have scheduled repair with Samsung. Picture quality is awesome though.
No, I would not recommend this to a friendBrand response from Samsung
Posted .TDAve,
We appreciate you sharing the details of your power issue and for your patience while waiting for your service appointment. Should you need further assistance after your service is complete, please contact Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Pro
- Cons mentioned:Reliability
DK w/faulty SAMSUNG 77"TV;bad salesman/bad service
||Posted . Owned for 2 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.I purchased a 77" QLED 11/12/24. picture great until black screen on 01/17/25 (72 hrs post return date). Best Buy no help. SAMSUNG serviced on 02/05/25 confirmed bad power board. PB on backorder no eta. Paid for extended warranty. Samsung will not replace and no est for repair. paid $2499.99 for a black screen laying on my guest bed. do not buy!!!!
No, I would not recommend this to a friendBrand response from Samsung
Posted .DanK,
We appreciate you sharing the details of your power issue and for your patience while waiting for replacement parts to arrive. Should you need further assistance after your service is complete, please contact Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website. ~ Samsung Specialist
- Pros mentioned:Picture quality
Power Board Issue
||Posted .This reviewer received promo considerations or sweepstakes entry for writing a review.Power board went out 3 times within one year of owning the tv. I was lucky enough that the 3rd time it went out a few days before my warranty. I immediately got a refund and told them to come get their TV back. Beautiful picture and all, but this will be last ever Samsung purchase ever.
No, I would not recommend this to a friendBrand response from Samsung
Posted .Chelly,
It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Should you ever decide to give Samsung TVs another try and have questions or need help with settings, setup, or features, please know we’re here to help. Call us at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week.
LiveChat with an agent as well as manuals, software, and warranty info can be found at the ‘Support’ link on our Samsung website.
We hope to regain you as a customer in the future.
~ Samsung Pro
- Cons mentioned:Reliability
Trash
||Posted . Owned for 4 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.I’ve only had this 77 inch paperweight for 4 months and it won’t turn on. Instead of dealing with the geek squad, Best Buy sent me to Samsung for service. Knowing what I know now about the hunk of garbage, I would never have bought it. Do yourself a favor and stay away from this tv.
No, I would not recommend this to a friendBrand response from Samsung
Posted .KevinR,
It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Please give us the opportunity to assist you by contacting Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
Terrible Purchase, 0 stars if possible
||Posted . Owned for 1 week when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.TV was open box purchase, I believed since this is a country-wide store you’d get better product than Facebook marketplace. However, in this case I was very very wrong. I took the bestbuy team at the store over an hour to get us the right tv even after the app said our purchase was ready for pick up. Then, the tv was wrapped in bubble wrap with serveral punctures on the wrapping. No box was given, no stand for the tv nor delivery was offered. After that, when we got home, we found out that they had given us the wrong power cord to even turn on the tv. After further inspections, we found that the screen was severely damaged with scratches, blemishes and separation from the top layer of the screen to the LED’s. The were several dents, the worst one is at the bottom right corner where it shows separation of the main front screen panel from the back of it. I tried to reach out to customer support but it’s outsourced to god knows where so it was ineffective and a waste of customers time. They didn’t want to help at all and basically only said that it was my problem because it was an open box purchase. Again you’d expect better products, even from openbox, from an established well known electronics store. I believe facebook marketplace would have been a better option, at least I would have been able to turn it on and inspect it before purchasing it (probably with a stand, correct power cord and a box). I have bought products from BestBuy since I was a young adult so i was really disappointed.
No, I would not recommend this to a friendBrand response from Samsung
Posted .GuillermoU,
We appreciate you sharing your experience with Samsung’s S90D TV. If purchased in open-box condition, we recommend contacting Best Buy directly for assistance. We hope your issue is resolved in a timely manner.
Should you have questions or concerns on usage or setup of your TV once your issue has been resolved, please call us at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Cons mentioned:Power supply
Not worth the money! Went dark after two months!!!
||Posted .This reviewer received promo considerations or sweepstakes entry for writing a review.Purchased this tv in November of 2024 and as of today it will not power on!!! Very disappointed on such an expensive set! Plus it’s college football bowl season!!!!!!
No, I would not recommend this to a friendBrand response from Samsung
Posted .It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Please give us the opportunity to assist you by contacting Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
Beautiful TV but crappy parts and service
||Posted . Owned for 2 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.Bought this TV in November 29, 2024. Looked and worked great until…. On February 1st, 2025, the TV would not turn on. Did several of the troubleshooting checks and ended up having to go through the Samsung Warranty. I did not buy the Best Buy service warranty. Anyway, Samsung initially indicated they need a month to come out to look at it. Not 100% sure what the issue is but pretty sucky for a new TV to go out after 2 months.
No, I would not recommend this to a friendBrand response from Samsung
Posted .Koondee,
We appreciate you sharing the details of your power issue and for your patience while waiting for your service appointment. Should you need further assistance after your service is complete, please contact Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Cons mentioned:Reliability
Lemon 77” OLED
||Posted . Owned for 1 month when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.I purchased the tv within a month we had to have it repaired. New part installed. Next day same problem now we are waiting for repair service again! Do not purchase the tv! Constantly resetting
No, I would not recommend this to a friendBrand response from Samsung
Posted .PeteK,
It’s unfortunate to hear of the issues you’re experiencing with your S90D TV, and we greatly appreciate your patience while waiting for your service appointment. Should you have any questions after your service is complete, Samsung is here for you. Call us at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
Broken less than 90 days after purchase
||Posted . Owned for 3 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.TV broke within the first 90 days. If it worked, im sure it would be great but, the picture quality is the worst ive ever seen. Its just black. It's so black, that it looks like a black hole i just threw my wallet into.
No, I would not recommend this to a friendBrand response from Samsung
Posted .It’s unfortunate to hear of your experience with Samsung’s S90D TV. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can enter your model number to review the full warranty details here: https://www.samsung.com/us/support/legal/LGL10000312/#standard-limited-warranty
Please give us the opportunity to assist you by contacting Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Cons mentioned:Reliability
DO NOT BUY, KNOWN DEFECT.
||Posted . Owned for 2 months when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.Repaired 2x/2 months. The 1 in store even broke 3x
No, I would not recommend this to a friendBrand response from Samsung
Posted .DTJP,
We appreciate you sharing your experience you went through to have your S90D TV serviced, but I hope your TV is now performing as expected.
Samsung is committed to providing the best possible product experience, quality, and value, and your feedback will be shared with our product and customer care teams.
If there’s anything we can do to further improve your experience, please know we’re here to help. You can reach us at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
Samsung 77"S90D colors and sound are bad.
||Posted . Owned for less than 1 week when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.The Samsung 77"S90D has bad colors. It seems to be dominated by blue colors. I tested the TV with Samsung support and sent them photos. They were not able to fix it. Also, the TV sound is terrible, but the Sonos Arc sound was acceptable. I have attached sample photos of my new TV and the same movie photos of my 16 years old Samsung TV.
No, I would not recommend this to a friendBrand response from Samsung
Posted .LevS,
Thank you for sharing your thoughts on the picture and sound quality of your S90DTV. To ensure you’ve got the latest updates, please confirm that your TV is up to date with the latest firmware version. You can check by going to: Home > Menu > Settings > Support > Software Update.
If the picture you’re seeing is still not to your liking after updating firmware, there are several picture settings you may want to try adjusting.
Go to Home > left direction button > Settings > All Settings > Picture > Picture Mode
...and select the mode that best fits your usage:
1. Standard: Is the default mode suitable for general viewing environments
2. Dynamic: Makes the picture brighter and clearer in bright viewing environments
3. Eco: Provided to save energy
4. Movie: Suitable for watching TV or movies in a dark room
5. Filmmaker Mode: Provides source content just as the creators intended. If the image is defined as Filmmaker Mode, it’ll automatically switch to Filmmaker Mode while watching.
You can also fine-tune your picture with expert settings such as brightness, contrast, sharpness and more (All Settings > Picture > Expert Settings).
If the sound is still not to your liking after updating firmware, there are several sound settings you can adjust to suit your personal preferences.
• Sound Modes may better meet your personal preferences. Go to: Menu > Settings > All Settings > Sound > Sound Mode, or Expert Settings to fine-tune and customize your sound.
• Adaptive Sound will also further optimize sound quality by analyzing the viewing space and the acoustic components of the content. Go to: Menu > Settings > All Settings > General & Privacy > Intelligent Mode Settings.
Should you choose to add a Samsung Soundbar to your TV, please know that our Q-Series Soundbars (such as the HW-Q600C) feature Q-Symphony which will synchronize with the speakers of your TV for an immersive 3D sound experience.
To assist you with possible settings adjustments for a better experience or choosing a Samsung Soundbar to complement your viewing enjoyment, please reach out to us at 1-800-SAMSUNG, 8 AM - 12 AM EST, seven days a week.
~ Samsung Specialist
Bad Best Buy experience
||Posted . Owned for 1 month when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.Bad Best Buy experience Denied price matching online
No, I would not recommend this to a friendBrand response from Samsung
Posted .ParakhV,
Please know you are leaving a review and 1-star rating for the S90D TV, but we are sorry to hear of your Best Buy experience, nonetheless. You may want to consider providing feedback directly to the Best Buy store where you made your purchase.
Should you have questions on the TV itself, Samsung is here for you. You can reach us at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Specialist
- Cons mentioned:Power supply, Reliability
Faithful Samsung customer for 25 years...no longer
||Posted . Owned for 1 year when reviewed.This reviewer received promo considerations or sweepstakes entry for writing a review.I bought this TV on November 9th, 2024. It stopped working on November 10th, 2025... one day after the factory warranty expired. Evidently, this model has a known power supply issue that can cause the TV panel to stop working. Samsung is aware of this issue, but hasn't issued a recall. Samsung customer service would not help whatsoever. The customer service agent stayed on her script for over an hour and continued to tell me her manager was busy and wasn't available to speak to me. It's been a terrible experience. I've bought Samsung TV's for over 2 decades and have never had this level of difficulty with their product or customer service. They have lost a 25 year loyal customer. I would recommend buying a different tv and a different brand.. or you may end up having a 77" paper weight like me.
No, I would not recommend this to a friendBrand response from Samsung
Posted .GeoffD,
I’m sorry to hear of the issues you’re experiencing with Samsung’s S90D TV. If your TV is out of the 1-year Manufacturer's Warranty, you can locate a service center in your area by following this link: https://www.samsung.com/us/support/service/locations/
Should you ever have questions or need help, Samsung is here for you. Just give us a call at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~ Samsung Pro
- Cons mentioned:Power supply, Reliability
Died just after warranty period. Sad
||Posted .This reviewer received promo considerations or sweepstakes entry for writing a review.Loved this TV until it died 14 months after purchase. Best Buy said it was out of the 12 monty warranty which it was but I contacted Samsung and they said I had two more days on the warranty. This model is notorious for power supply failures. Samsung sent out a tech to replace boards. No Joy. Totally dead. Samsung is working with me now to replace or reimburse us. I have 6 other Samsung TVs that have all been great. Swapping over to LG for my next one. Samsung customer service has been excellent.
No, I would not recommend this to a friendBrand response from Samsung
Posted .PaulS,
We appreciate you sharing the details of your power issue and for your patience while waiting for resolution. Should you need further assistance, please contact Samsung Customer Support at 1-800-SAMSUNG, 8AM - 12AM EST, 7 days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website.
~Samsung Pro