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Fitbit - Sense 2 Advanced Health Smartwatch - Pale Gold - (2022)

Model: FB521GLBM-US
SKU: 6514033
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Specifications
  • Screen Size
    40.5 millimeters
    Touch Screen
    Yes
    Operating System Compatibility
    Android, Apple iOS
    App Compatible
    Yes
    Built-in Storage
    0 gigabytes
    Global Positioning
    GPS, GLONASS
  • Key Specs
    • Screen Size: 40.5 millimeters (Size of the screen, measured diagonally from corner to corner.)
    • Touch Screen: true (Touch-screen devices make navigating more intuitive. Using a touch-screen display, you can do things such as tap to select, hold and drag to move items, swipe to scroll, and pinch to zoom.)
    • Operating System Compatibility: Android, Apple iOS
    • App Compatible: true (The product can be connected to a program or software application on a mobile device, which then receives collected data from the product.)
    • Built-in Storage: 0 gigabytes
    • Global Positioning: GPS, GLONASS (A system of satellites which enables a mobile receiver to determine its precise location based on signals received from satellites such as the US Global Positioning System (GPS), the Russian Global Navigation Satellite System (GLONASS), the European Global Navigation Satellite System (Galileo), or the Japanese Quasi-Zenith Satellite System (QZSS).)
    • Metrics Measured: Activity vs. inactivity, Altitude changes, Blood oxygen, Respiration rate, Cadence, Calories burned, Distance swam, Distance traveled, Duration of exercise, Electrocardiography (ECG), Hours slept, Laps swam, Pace, Route, Duration of sleep stages, Running/Walking speed, Steps taken, Skin temperature, Glucose
    • Protective Qualities: Water resistant, Dust resistant
    • Maximum Depth of Water Resistance: 164 feet (Measurement of the maximum depth of water in which the product is able to resist some degree of water penetration.)
    • Band Material: Silicone
    • Series: Sense 2 (Part of a group of the same product type with similar features.)
  • General
    • Brand: Fitbit
    • Model Number: FB521GLBM-US
    • Product Name: Sense 2 Advanced Health Smartwatch
    • Color: Pale Gold
    • Product Type: Activity tracker, Smartwatch
    • Form Factor: Wristwatch (The size, arrangement, and physical configuration of the product.)
    • Model Family: Fitbit Sense 2
    • Series: Sense 2 (Part of a group of the same product type with similar features.)
    • Year of Release: 2022
  • Design
    • Case Shape: Rounded square
    • Band Type: Infinity
    • Band Color: Blue Mist
  • Display
    • Display Screen: true
    • Screen Size: 40.5 millimeters (Size of the screen, measured diagonally from corner to corner.)
    • Touch Screen: true (Touch-screen devices make navigating more intuitive. Using a touch-screen display, you can do things such as tap to select, hold and drag to move items, swipe to scroll, and pinch to zoom.)
    • Display Type: AMOLED
    • Color Display: true
    • Clock Display: true
    • Backlit Display: true (Integrated lights allow for visibility of the display in low-light conditions.)
    • Adjustable Brightness: true
    • Customizable Watch Faces: true
  • Compatibility
    • Operating System Compatibility: Android, Apple iOS
    • App Compatible: true (The product can be connected to a program or software application on a mobile device, which then receives collected data from the product.)
    • Voice Assistant Built-in: Amazon Alexa (A digital assistant built into the device that uses voice commands to answer questions and control smart devices.)
  • Connectivity
    • Data Plan Required: false
    • Wireless Connectivity: Bluetooth (The manner in which a device sends data to another device over a short distance without the use of wires or cables.)
  • Features
    • Built-in Storage: 0 gigabytes
    • GPS Enabled: true
    • Global Positioning: GPS, GLONASS (A system of satellites which enables a mobile receiver to determine its precise location based on signals received from satellites such as the US Global Positioning System (GPS), the Russian Global Navigation Satellite System (GLONASS), the European Global Navigation Satellite System (Galileo), or the Japanese Quasi-Zenith Satellite System (QZSS).)
    • Mobile Notifications: true
    • Alert Type: Vibration, Visual
    • Silent Alarm: true
    • Built-In Microphone: true
  • Activity
    • Metrics Measured: Activity vs. inactivity, Altitude changes, Blood oxygen, Respiration rate, Cadence, Calories burned, Distance swam, Distance traveled, Duration of exercise, Electrocardiography (ECG), Hours slept, Laps swam, Pace, Route, Duration of sleep stages, Running/Walking speed, Steps taken, Skin temperature, Glucose
    • Multi-Sport Tracking: true
    • Sensors: Accelerometer, Altimeter, Ambient light sensor, Electrical heart rate (ECG) sensor, Optical heart rate (PPG) sensor, Pulse oximeter (Sp02) sensor, Temperature sensor (Detects stimuli such as heat, light, sound, motion, or pressure and responds accordingly by operating a control or initiating a function of the device.)
  • Performance
    • Protective Qualities: Water resistant, Dust resistant
    • Maximum Depth of Water Resistance: 164 feet (Measurement of the maximum depth of water in which the product is able to resist some degree of water penetration.)
    • Minimum Operating Temperature: -14.0 degrees fahrenheit (The lowest recommended ambient (surrounding) temperature in which the product can ideally operate stated by the manufacturer. Generally long-term exposure of the product to temperatures less than the minimum can result in ineffective operation.)
    • Maximum Operating Temperature: 113 degrees fahrenheit (The highest recommended ambient (surrounding) temperature in which the product can ideally operate stated by the manufacturer. Generally long-term exposure of the product to temperatures more than the maximum can result in ineffective operation.)
  • Dimensions
    • Product Height: 0.4 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
    • Product Width: 1.59 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
    • Product Weight: 0.083 ounces (The out of box weight of the item.)
    • Product Length: 9.79 inches (The out of box length of the item. Length is measured as the longest dimension of the item.)
    • Minimum Wrist Size: 139.7 millimeters
    • Maximum Wrist Size: 220.98 millimeters
    • Size: Adjustable
    • Band Size: Adjustable
  • Power
    • Rechargeable: true
    • Charging Interface(s): USB-A (The connection for transmitting power to charge the device.)
    • Battery Chemistry: Lithium-polymer
    • Replaceable Battery: false
  • Material
    • Band Material: Silicone
    • Case Material: Aluminum
  • Warranty
    • Warranty - Parts: 1 year limited
    • Warranty - Labor: 1 year limited
  • Other
    • UPC: 810073611436

Meet Sense 2—the smartwatch designed to help you stress less, sleep better & live healthier. Get help identifying stress and get the tools to better manage it. Learn more about your sleep and how to improve your rest with detailed nighttime tracking and a unique Sleep Profile. Track key heart-health indicators so you can make more informed wellness decisions. Plus Sense 2 is packed with advanced activity tracking and smartwatch features and includes 6 months of Fitbit Premium Membership1. Fitbit is part of the Google family.

  • All-day Stress Detection: Recognize stressful events, manage them and move on with our new continuous EDA sensor on Sense 2. It helps detect stress events so you can start to see how and when your stress is triggered. Use of the cEDA sensor may affect battery life.
  • Stress Management Score: Get a handle on your stress. Higher score? You're showing fewer signs of stress. Lower score? Time to find better balance--try a meditation or go for a walk.
  • Sleep Profile: It's easier to get better sleep when you know what kind of sleeper you are. Find out whether your sleep mirrors a deep-sleep bear, a slow-to-sleep tortoise or one of our other Sleep Animals., then learn what habits best to support your profile.2
  • Sleep Stages & Sleep Score: Learn about the quality of your previous night's sleep with a personalized Sleep Score. With Premium, see a breakdown of time in light, deep & REM sleep to see what's impacting your rest.
  • Fitbit ECG App & Irregular Heart Rhythm Notifications: There are two ways to uncover Afib, right at your fingertips. With the ECG app, you can take an assessment on demand. Plus, use irregular heart rhythm notifications to look for signs of Afib while you're still or sleeping.3
  • High & Low Heart Rate Notifications: Your heart rate is a key indicator of health, so Sense 2 keeps you informed when it's above or below your set resting threshold.
  • Daily Readiness Score: Enhance yoru workout routine with a Daily Readiness score that reveals if you're ready to push or should focus on recovery.4
  • Active Zone Minutes: Get the results you want from every workout. Active Zone Minutes uses your heart rate to guide you toward your desired intensity level--then helps you get there.
  • Built-in GPS: See you real-time pace & distance without your phone using built-in GPS during outdoor activity, then see a map of your workout route in the Fitbit app.
  • 40+ Exercise Modes: Sense 2 tracks more exercises than ever--like skiing, golf, stand-up paddle boarding and more--and see all your stats in real time.
  • Notifications: Get notifications for calls, texts, calendar events and apps like Gmail and Venmo--plus send quick replies and voice replies right from your wrist. Available when phone is nearby.
  • Calls From Your Wrist: Use the built-in mic and speaker to take Bluetooth calls hands-free, send callers to voicemail and adjust volume. Available when phone is nearby.
  • Google Maps: With Google Maps on your Fitbit watch, navigation is easier than ever. Explore a new route confidently with turn-by-turn directions on your wrist. (Phone must be nearby. Available on Android only, Coming Spring 2023 to iOS.)
  • Google Wallet: Tap your wrist to pay everywhere Google Pay is accepted. The quick, secure and contactless way to check out with your watch.
  • Built-in Voice Assistant: Use Amazon Alexa Built-in to get quick news and weather, set bedtime reminders and alarms, control your smart home devices and more--just by speaking to your watch.5
  • 6-month Fitbit Premium Membership: Get deeper insights and guidance, exclusive workouts, mindfulness sessions and more with the included 6-month Premium membership.1
  • All-day Stress Detection: Recognize stressful events, manage them and move on with our new continuous EDA sensor on Sense 2. It helps detect stress events so you can start to see how and when your stress is triggered. Use of the cEDA sensor may affect battery life.
  • Stress Management Score: Get a handle on your stress. Higher score? You're showing fewer signs of stress. Lower score? Time to find better balance--try a meditation or go for a walk.
  • Sleep Profile: It's easier to get better sleep when you know what kind of sleeper you are. Find out whether your sleep mirrors a deep-sleep bear, a slow-to-sleep tortoise or one of our other Sleep Animals., then learn what habits best to support your profile.2
  • Sleep Stages & Sleep Score: Learn about the quality of your previous night's sleep with a personalized Sleep Score. With Premium, see a breakdown of time in light, deep & REM sleep to see what's impacting your rest.
  • Fitbit ECG App & Irregular Heart Rhythm Notifications: There are two ways to uncover Afib, right at your fingertips. With the ECG app, you can take an assessment on demand. Plus, use irregular heart rhythm notifications to look for signs of Afib while you're still or sleeping.3
  • High & Low Heart Rate Notifications: Your heart rate is a key indicator of health, so Sense 2 keeps you informed when it's above or below your set resting threshold.
  • Daily Readiness Score: Enhance yoru workout routine with a Daily Readiness score that reveals if you're ready to push or should focus on recovery.4
  • Active Zone Minutes: Get the results you want from every workout. Active Zone Minutes uses your heart rate to guide you toward your desired intensity level--then helps you get there.
  • Built-in GPS: See you real-time pace & distance without your phone using built-in GPS during outdoor activity, then see a map of your workout route in the Fitbit app.
  • 40+ Exercise Modes: Sense 2 tracks more exercises than ever--like skiing, golf, stand-up paddle boarding and more--and see all your stats in real time.
  • Notifications: Get notifications for calls, texts, calendar events and apps like Gmail and Venmo--plus send quick replies and voice replies right from your wrist. Available when phone is nearby.
  • Calls From Your Wrist: Use the built-in mic and speaker to take Bluetooth calls hands-free, send callers to voicemail and adjust volume. Available when phone is nearby.
  • Google Maps: With Google Maps on your Fitbit watch, navigation is easier than ever. Explore a new route confidently with turn-by-turn directions on your wrist. (Phone must be nearby. Available on Android only, Coming Spring 2023 to iOS.)
  • Google Wallet: Tap your wrist to pay everywhere Google Pay is accepted. The quick, secure and contactless way to check out with your watch.
  • Built-in Voice Assistant: Use Amazon Alexa Built-in to get quick news and weather, set bedtime reminders and alarms, control your smart home devices and more--just by speaking to your watch.5
  • 6-month Fitbit Premium Membership: Get deeper insights and guidance, exclusive workouts, mindfulness sessions and more with the included 6-month Premium membership.1
Whats Included
  • Fitbit Sense 2
  • Infinity Band (Small & Large)
  • Charging Cable
  • Fitbit Sense 2
  • Infinity Band (Small & Large)
  • Charging Cable

Q: Currently, I have the Fitbit Sense 1, and I have a sports band that I paired with it, will the new Fitbit 2 fit? Are the measurements of the two brands identical in size?

A: Yes, the same bands seem to fit from my original Sense 1. It's missing many of the features of the Sense 1 though, it's essentially a downgrade from the original

Q: Does this watch detect irregular heart beats or afib?

A: I have Atrial Fibrillation, which is mostly controlled with medicine. This watch will let your phone know when you had it at night. Also, when you are in it, you can detect it with the ECG app.

Q: Do this fitbit have a telephone number ? M

A: It will if after you connect it to your mobile phone via bluetooth. I answer/take calls from my fitbit sense 2, able to read text messages from it too! The latest fitbit software updates added the call’s microphone/speaker support which I really appreciate! Now I can talk via my watch conveniently, pretty clear audio! I believe quick text reply’s supported but I prefer doing that on my phone…

Q: Does the metal in the watch contain nickel? I have an allergy.

A: It hasn't bothered me and I am sensitive to nickel as well.

Q: Is the charging cable the same or compatible with that of the original Fitbit Sense?

A: Yes it does. I had the first one and now have the second one.

Q: Can the screen be seen in sunlight?

A: Yes, and it looks very good.

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Pros for Fitbit - Sense 2 Advanced Health Smartwatch - Pale Gold - (2022)
Overall Performance, Battery Life, Features, Ease of use, Sleep TrackingBattery Life, Overall Performance, Stats Tracking, Ease of UseOverall Performance, Battery Life, Ease of use, Screen Size, DesignOverall Performance, Battery Life, Ease of use, Features, Sleep Tracking
Cons for Fitbit - Sense 2 Advanced Health Smartwatch - Pale Gold - (2022)
Band Comfort, Screen SizeThere were no cons for this productConnectivity, Oxygen Sensor, Band MaterialConnectivity, Band Quality, Charging, GPS

Specs

Reviews

Customers are saying

Customers regard the Sense 2 Advanced Health Smartwatch highly for its battery life, ease of use, and overall performance. Users appreciate features like sleep tracking, heart rate monitoring, and the improved screen quality. However, some customers have reported issues with band comfort and connectivity. A few users have also mentioned problems with charging.

This summary was generated by AI based on customer reviews.

Customer Images

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    My Essential Health Partner

    The Fitbit Sense 2 Advanced Health Smartwatch has become my unwavering ally in health management. Being in a sedentary job, I needed something to keep me on my toes - literally - and this smartwatch has nailed it. It accurately tracks my daily walks, motivating me to meet my step goals, and sends subtle reminders to move when I've been idle for too long, which has been incredibly beneficial given my work nature. Equally impressive is its sleep tracking feature, providing a thorough breakdown of my sleep stages. This has allowed me to understand how sleep, or a lack thereof, impacts my stress levels, facilitating better self-care measures. And when my sleep isn't up to par, the device steps in with helpful tips for better sleep hygiene. The Fitbit Sense 2 doesn't stop at merely observing; it aids in stress management too. Recognizing the correlation between poor sleep and increased stress in my life, it provides tools like guided breathing and mindfulness sessions, which have been a boon during stressful workdays. Now, a feature that genuinely deserves appreciation is the silent alarm. As someone who shares a room with my wife and kids, I can't emphasize enough how invaluable this has been. The gentle wrist vibrations wake me up for work without disturbing my family's peaceful sleep - a feature that has been a game-changer in maintaining our morning routines. The design is sleek, comfortable for 24/7 wear, and the graphite finish lends it a chic, modern touch. Plus, the battery life is commendable, easily lasting a few days on a single charge. In summary, the Fitbit Sense 2 Advanced Health Smartwatch is more than a gadget; it's my personal health assistant, keeping me active, aiding in stress management, and ensuring harmonious mornings. For those looking to elevate their health and lifestyle, I couldn't recommend it more highly.

    This review is from Fitbit - Sense 2 Advanced Health Smartwatch - Graphite - (2022)

    Posted by Umair

  • Rated 5 out of 5 stars

    Fitness

    Fit bit is a replacement for one that I already have. Works great and the app is easy to understand

    This review is from Fitbit - Sense 2 Advanced Health Smartwatch - Graphite - (2022)

    Posted by EduardorO

  • Rated 5 out of 5 stars

    Great Investment for My Health

    I already owned a Fitbit Charge 5, but wanted a fitness smartwatch with a bigger display. After reading multiple reviews of various brands/styles of fitness watches, I settled on the Fitbit Sense 2, 1) I was already familiar with the Fitbit app. 2) For me, Fitbit's support has been really good. They are quick to respond and walk you through problems/setup, etc. 3) I wasn't interested in a watch with the ability to install apps, send or receive text messages, etc. 4) The Sense 2 is approx 2.5x the price of the Charge 5 I already owned, but for me, the Sense 5 had all the features I wanted and I liked the look of the display. 5) Battery lasts me a minimum of 5-6 days. I have my watch and phone connected all day long via Bluetooth. 6) I like the ability to add/customize different watch "faces." 7) The only complaint -- if you want to call it that -- is Fitbit's revamped "sleep tracker". The graphics aren't very intuitive to me. They get the job done; I can check my sleep score. I chose to purchase through BestBuy because I'm already a TotalTech member and have saved several hundred dollars on repairs, etc over the years. That extra peace of mind is worth it.

    This review is from Fitbit - Sense 2 Advanced Health Smartwatch - Graphite - (2022)

    Posted by CoolOldGuy

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