Skip to contentGo to Product Search
Main Content

Customer Ratings & Reviews

  • Front. Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Cobalt Blue.
  • Surprisingly Bigger 360 Sound + Great Outdoor Speaker
  • The text on the image is grouped as follows: 1. "Outdoor Boost + Podcast Mode + EQ for Outdoors. EQ for Vocals." The corrected text is: "Outdoor Boost + Podcast Mode + EQ for Outdoors. EQ for Vocals."
  • 14 HOURS OF BOOM ON A SINGLE CHARGE
  • The text on the image is grouped and corrected as follows: 1. 104 mm (4.09 in) 2. Volume Control 3. USB-C Charging Port 4. Bluetooth Pairing 5. Double Up Ears 6. Ultimate Outdoor Boost/ Podcast Mode 7. Power On/Off 8. 31% Recycled Plastic* 9. FSC SC MRAS
  • Designed for a Positive Future. Made with Recycled Plastic. Responsible Packaging.
  • The text on the image reads: "Double Up for Stereo Sound. Twice the Sound. Twice the Wonder."
  • Waterproof + Floatable IP67 Rated for Durability.
  • Ultimate Ears - Wonderboom 4 - Unboxing Video video 3 minutes 17 seconds
  • Logitech - Wonderboom 4 Unboxing video 0 minutes 30 seconds

Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Cobalt Blue

Model:
984-001877
SKU:
6584240
Highly rated by customers for:
$79.99
Save $20
Comp. Value: $99.99

Customer reviews

Rating 4.8 out of 5 stars with 276 reviews

Rating Filter

Rating by feature

  • Sound Quality

    Rating 4.7 out of 5 stars

  • Battery Life

    Rating 4.8 out of 5 stars

  • Range

    Rating 4.7 out of 5 stars

Pros mentioned filter

Cons mentioned filter

95%would recommend to a friend

Customers are saying

Customers highly value the WONDERBOOM 4 Portable Wireless Bluetooth Speaker for its sound quality and portability. Many appreciate the speaker's good battery life and easy Bluetooth connectivity. The water resistance is a welcomed feature, along with the volume and size. Overall, customers seem to enjoy the bass and waterproof design.

This summary was generated by AI based on customer reviews.

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.
Page 8 Showing 141-160 of 276 reviews
  • Pros mentioned:
    Sound quality

    Excellent value

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great sounds from a compact size. And it’s very well made.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thank you for sharing your experience with the WONDERBOOM 4! We’re delighted that you’re enjoying the big sound and premium build quality packed into its compact design. Logitech

  • Pros mentioned:
    Sound quality

    Good buy

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great sound for the size and price. Hopefully the strap holds up.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thank you for your kind words! We’re delighted the product is performing well for you. Your feedback inspires us to keep pushing forward. Logitech

  • Pros mentioned:
    Sound quality

    wonderboom 4

    |
    |
    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    great sound for a small speaker, easy to set up and use.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Sand Beige

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      We’re so pleased to hear your experience has been positive. Your input helps us build better products for everyone. Logitech

  • Exelente

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Excellent!!! product o really like It. Quality and Size great

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Joyous Brights

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thanks for taking the time to share your experience. We’re delighted the product is working well for you. Your feedback means a lot. Logitech

  • Pros mentioned:
    Battery life, Sound quality

    Awesome little speaker!

    |
    |
    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Massive sound in such a small package! Great product! Battery lasts long and we take it everywhere!

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thanks for the kind words! We're delighted that you're enjoying the WONDERBOOM 4's impressive sound, impressive battery life, and compact size. It's designed to be your go-to speaker for any adventure. Logitech

  • Great speaker

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This speaker lives up to the good reviews. It has a really powerful and great speaker. I am enjoying the podcast feature that boosts talking voices, making them a bit clearer and easier to hear when background sound is also going on in your environment.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      We truly appreciate you sharing your thoughts. It’s fantastic to hear the product is delivering as expected. Your feedback helps us grow and refine what we do. Thanks for choosing Logitech! Logitech

  • Pros mentioned:
    Portability, Sound quality

    Great speaker

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Sounds great… connects to my phone very easily very portable

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Joyous Brights

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      It's great to hear the WONDERBOOM 4 is connecting smoothly and offering that portability. Appreciated the feedback on the overall experience. Logitech

  • Pros mentioned:
    Portability, Sound quality

    LOVE IT

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    great speaker for the price. small and easy to carry around with big sound.

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thank you for your positive review of the Ultimate Ears - WONDERBOOM 4! We're glad you're enjoying its impressive sound quality and compact, portable design. We strive to create products that deliver exceptional audio experiences, and we appreciate your feedback. Logitech

  • Pros mentioned:
    Sound quality

    Worth it

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Can't beat it for the price, get two to link. More sound rather than louder, always the play.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Joyous Brights

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thank you for your kind words and for letting us know how our product is working for you. We’re thrilled that it’s meeting your needs and making a positive impact. Your feedback is incredibly valuable to us, and we’re grateful you chose Logitech. Logitech

  • Pros mentioned:
    Portability

    Great

    |
    |
    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great speaker for around the house and the yard.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thanks for sharing your experience! We’re thrilled the Ultimate Ears WONDERBOOM 4 Wireless Speaker is working as intended. Your feedback helps us grow. Logitech

  • Pros mentioned:
    Sound quality

    Powerful sound

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    These little speakers are amazing!! Easy to hook up and they sound like a much larger than they look. Saved hundreds, if not thousands by going with these instead of permanent speakers

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Sand Beige

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thank you for the fantastic review! It’s great to hear the speakers exceeded expectations with powerful sound and easy setup. So glad they’ve been a smart and satisfying choice! Logitech

  • Pros mentioned:
    Portability, Sound quality

    Wonderful little portable speakers.

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Love the WonderBoom speakers! Easy to use and move from place to place or event to event. The sound is just as the name suggests.

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      We're delighted to hear that you're enjoying the Ultimate Ears WONDERBOOM 4 speakers! Their compact size, powerful sound, and easy portability make them a great choice for taking music with you wherever you go. Thank you for your positive feedback.

  • Pros mentioned:
    Sound quality

    The little giant

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I use my WONDERBOOM 4 in the backyard when I garden. It has a nice smooth sound and when I turn it up, the neighbors across the arroyo can hear it. I play jazz, classical, and salsa. For the size and money, it is great.

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Wow, that's fantastic to hear! We at Logitech are absolutely thrilled that your Ultimate Ears WONDERBOOM 4 is bringing such joy to your gardening sessions. Logitech

  • Pros mentioned:
    Sound quality

    Practicable and powerful sound

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Excelent sound from this little monster. Nice build, great quality this is my third speaker from this brand

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      We’re really grateful for your thoughtful review. It’s wonderful to know that our Ultimate Ears WONDERBOOM 4 Speaker is delivering the performance and ease of use you were hoping for. Hearing from satisfied users like you keeps us motivated. Thanks for choosing Logitech! Logitech

  • Room-Filling Sound in a Compact Package

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    You won’t believe the sound that comes out of such a small speaker. It easily fills the room with rich bass and clear, crisp audio. For its size, the sound quality is seriously impressive.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Sand Beige

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      It’s fantastic to hear that you’re satisfied with your Logitech product. We strive to deliver quality and reliability, and your feedback reassures us that we’re on the right path. Thanks for your continued support—we’re lucky to have you with us. Logitech

  • Pros mentioned:
    Portability, Sound quality

    Great Product!

    |
    |
    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works like it should. Small, compact with great sound.

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thank you for your positive review of the Ultimate Ears WONDERBOOM 4 in Cobalt Blue! We're thrilled to hear you're enjoying the compact size, great sound, and the reliable performance. It's fantastic to know the waterproof, dustproof, and floatable design is working well for you. We appreciate your feedback and hope you continue to enjoy your WONDERBOOM 4! Logitech

  • Pros mentioned:
    Sound quality

    wonderboom 4

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The wonderboom 4 is unbelievable for the price. Its sound is amazing and clear. Its a bang for your buck product and highly recommend it.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thanks for the glowing review! It’s great to hear the WONDERBOOM 4 is delivering impressive clarity and value. A compact powerhouse that truly earns its reputation—appreciate the recommendation. Logitech

  • Pros mentioned:
    Sound quality

    Great choice

    |
    |
    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Good choice. Sound really great. It also loud, we never even listen it on max.

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Thanks for sharing! We're happy to hear you're impressed with the WONDERBOOM 4's sound quality and volume. We strive to deliver a powerful audio experience. Logitech

  • Pros mentioned:
    Sound quality

    Wonderboom boom

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Nice bass. Great sound. Nice volume control. Easy to pair & pairs with more then one person. Pretty good for the price. Would recommend

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      That's wonderful! We're delighted to hear you're enjoying the Ultimate Ears WONDERBOOM 4. It sounds like it's hitting all the right notes with its bass, sound quality, volume control, and easy pairing. We're especially glad you find it a great value and would recommend it. Thanks for sharing your positive experience! Logitech

  • Pros mentioned:
    Portability

    Wonderboom 4

    |
    |
    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    For the price it’s an amazing speaker and yes it dose float personally tested

    This review is from Ultimate Ears - WONDERBOOM 4 Portable Wireless Bluetooth Speaker with Waterproof, Dustproof and Floatable design - Active Black

    I would recommend this to a friend
    • Brand response from Logitech
      Posted .

      Hey! We’re thankful for your review. It’s rewarding to know our product is meeting your expectations. Thanks for being part of our community. Logitech

Page 8, Showing 141-160 of 276 reviews
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.