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Ultimate Ears

Ultimate Ears WONDERBOOM 4 Portable Waterproof Speaker - Black | Balanced 360-degree sound and bass, dustproof floating design, 131ft (40m) wireless range

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Availability: Only 3 left in stock, order soon!
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Arrives Thursday, Aug 6
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Color: Black


Features

  • Balanced 360-Degree Sound: The WONDERBOOM 4 portable waterproof Bluetooth speaker features 360-degree sound in a petite package; boosted sound for up to 14 hours of playtime
  • Outdoor Boost and Podcast Mode: Engineered for full stereo sound; tap the Outdoor Boost button for outdoor environments; use the new Podcast Mode to make vocals sound rich and clear
  • 14 Hours of Boom: With a rechargeable battery that lasts throughout the day, this waterproof portable speaker booms on with up to 14 hours of playtime, so you can soak up every moment; Charging via USB-C cable (not included)
  • Waterproof, Dustproof, and Floatable: IP67-rated this Bluetooth waterproof speaker can be submerged in 1m of water for 30 min; protected from dust; ideal for the pool, beach, or shower
  • Double Up for Stereo: Pair up two WONDERBOOM 4 portable Bluetooth speakers for even bigger sound; press once to double up; press again for true stereo from both speakers, with left and right channels (not compatible with PartyUP)
  • Durable Wireless Speaker With Range: 131 feet (40 meters) of range so youre free to roam; plus its dirt-resistant and drop-proof (1) with a handy loop so you can take it with you
  • Made With Recycled Plastic: Plastic parts in the WONDERBOOM 4 wireless Bluetooth speaker include a minimum of 31% post-consumer recycled plastic by weight
  • (1) Drop-tested from 5 ft / 1.5 m

Description

The Ultimate Ears WONDERBOOM 4 Portable Waterproof Bluetooth Speaker is a floating Bluetooth speaker that is ultra portable with surprisingly bigger, 360-degree sound. It’s crisp, bassy, and ready to go with 14 hours of boom. The IP67 rating means this wireless bluetooth speaker is waterproof, dustproof, and floats. Take it to the pool, the beach, or use it as a bluetooth speaker for shower. Experience amazing sound—wherever life takes you with these wireless speakers with bluetooth. Suitable for outdoor adventures, this speakers bluetooth wireless features make for a loud bluetooth speaker. Whether as portable speakers for outdoor or for indoor use, this bluetooth speaker is a practical choice. Great for those on the go, enjoy wireless speakers that deliver powerful sound in any setting.

Brand: Ultimate Ears


Speaker Maximum Output Power: 10 watts


Frequency Response: 75 hertz


Connectivity Technology: Bluetooth


Audio Output Mode: Stereo


Audio Output Mode: Stereo


Mounting Type: Freestanding


Enclosure Material: Carbon Steel


Speaker Type: Outdoor


Additional Features: Dustproof, Lightweight, Portable, Shockproof, Waterproof


Antenna Location: For Computers, For Smartphones or Tablets


Color: Black


Is Waterproof: True


Warranty Type: Limited


Maximum Range: 131 feet


Control Method: Touch


Speaker Size: 40 millimeters


Tweeter Diameter: 0.75 inches


Water Resistance Level: Waterproof


Bluetooth Range: 40 meters


Specific Uses For Product: Gaming, Party, Travel


Battery Average Life: 14 hours


Controller Type: Battery Powered


Unit Count: 1 Count


Item Dimensions D x W x H: 4"D x 4"W x 8"H


Item Weight: 1.2 pounds


Compatible Devices: Desktop, Laptop, Smartphone, Tablet, Television


Power Source: Battery Powered


Number of Batteries: 1 Lithium Polymer batteries required.


Audio Driver Type: Dynamic Driver


Audio Driver Size: 40 millimeters


Number Of Circuits: 1


Brand: Ultimate Ears


Model Number: 984-001876


Model Name: Wonderboom 4


Built-In Media: Wonderboom 4 Black


Warranty Description: 1 Year Limited Hardware Warranty


Number of Items: 1


Series Number: 4


UPC: 097855189943


Global Trade Identification Number: 43


Manufacturer: Logitech


Age Range Description: Teen and Adult


Speaker Maximum Output Power: 10 watts


Frequency Response: 75 hertz


Number of Audio Channels: 4 2


Connectivity Technology: Bluetooth


Wireless Technology: Bluetooth


Subwoofer Connectivity Technology: Wireless


Connectivity Protocol: Bluetooth


Battery Capacity: 14 milliamp_hours


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Wonderboom speaker
Color: Gray
Review Image by Keith J Boothroyd
Ultimate Ears Wonderboom Speaker 4 is an amazing little speaker. This is our second one (only because we lost the first). Sound quality is top notch and it’s easy to use and so portable. It’s lighter and smaller and less expensive than then the big name brand pill versions. Love the fun color choices too. We bought it because of its floating feature so we can take in on our Duffy boat. But it’s a great speaker for the pool, at the pickleball courts or just enjoying music in our backyard. Holds a charge all day. ... show more
Reviewed in the United States on July 5, 2026 by Keith J Boothroyd
    • Great Sound from Small Package (and it freakin’ floats)
Color: Blue
Got this on a recent sale/discount Amazon had as the wife keeps losing our Bluetooth speakers, so I didn’t want to spend too much. It’s waterproof and floats (actually floats I didn’t believe the product description). Figured being so small and waterproof it wouldn’t have decent sound but it actually punches well above its size. Has an outdoor button to amplify the sound more (when you’re at the pool or a BBQ). You can connect 2 for stereo sound. Easy and intuitive to use/connect to phone etc. I think these are worth the original MSRP but if you see one on sale I’d grab one. Great little speaker! ... show more
Reviewed in the United States on June 28, 2026 by Jason
    • Great little portable speaker
Color: Black
It's easy to pack around and has pretty good sound for such a little guy. Primary uses are music and audiobooks and the sound quality good enough that I'm satisfied. It's not Bose, but it sure ain't bad. I use it in the shop, out by the pool and when I'm gardening. Outdoors the sound travels a bit better if there is a wall or something solid behind the speaker. The loop makes it easy to carry or hang up and the 360⁰ sound means less fussing around with location and direction. Connected to my Android, playing on Spotify, I can crank it all the way up with no distortion or crackling. But, I only did that this one time, so I could note it in the review. It's pretty freaking loud. It's solid with a rubber cap on both the top and bottom. In case of a drop, those could be lifesavers. I've never tossed it in the water, so cannot attest to it's water resistance. It connects quickly and easily to any Bluetooth device and the buttons on top provide easy access to pairing, pause and power. It will power down if left unused for a few minutes to preserve the battery. That's a nice function. I'm not wild about the HUGE volume controls on the front. I think they're ugly and detract greatly from the overall appearance of the speaker. Overall, good value for the money. ... show more
Reviewed in the United States on March 22, 2026 by Kate S
    • This thing is great
Color: Blue
This is a great travel speaker. Extremely easy to setup…look less than 5 minutes. And the sound is wonderful. Great vocal sound with just enough mid and bass. The volume is great for rooms or hotels. It’s small enough to take everywhere. Sounds much better than my Sonos Roam and much easier to deal with. ... show more
Reviewed in the United States on June 21, 2026 by TDog
    • Wonderboom is Wonderful
Color: Blue
Great speaker. I teach aqua fitness at 2 large pools, and the sound is clear...not tinny sounding...and can be heard by the participants in the back. It's easy to operate and reasonably priced. I would buy it again.
Reviewed in the United States on July 11, 2026 by CW
    • GREAT BUT BATTERY RECHARGING IS RIDICULOUS
Color: Pink
Overall this thing is super. Great sound, easy to pair & use, tremendous volume & decent battery life. The one unbelievable idiotic feature is battery charging. There's no light or sound to tell you ACCURATELY how full the battery currently is. If you press a button it will say "Normal Battery Level Enjoy The Music" when the stupid thing is somewhere between 36% & 100%. Are you kidding me? 36% is barely 1/3 full & there's nothing to indicate if it's actually 40%, 57%, 84% or 100%. What kind of engineer came up with this & how did it possibly get all the way into production with no one saying, "this is the dumbest thing we've ever made". I had a rechargeable speaker for my 2nd Gen iPod in 2002 with 4 little red lights, 1 light meant 25% charged, 2 lights 50% & so on. Simple, clear & easy, didn't need to talk to tell me absolutely nothing. So now 24 years later & these rocket surgeons can't pull this off with all the advancements in tech over the last 2 decades? ... show more
Reviewed in the United States on February 27, 2026 by John P.
    • Good sound separation with solid base.
Color: Black
Good sound separation for such a small speaker. Solid bass with clear mids and highs. The passive radiators work well with the mid/high active speakers (two of each). And the 360 sound is nice too. Just don’t try to blast it full volume, leave that for the right stuff!
Reviewed in the United States on June 22, 2026 by David
    • Bass heavy!
Color: Blue
This speaker is bass heavy and I don't know if I hate or loved it. Great for certain music bad for others that doesn't need the additional bass. No way to adjust bass since there are no app for this speaker. The speaker sounds great and it gets plenty loud. Pro: -Setting it up is easy. Out of the box it's in pair mode. Easy pair on the android device. -Great built quality. It is sturdy and well built. Con: -No app to fine tune sound setting -start up and power off noise is loud. No way to adjust that. What more can I say. It sounds great compared to other speakers in this category and price range. Basic, no frill, no overly complicated speaker. It gets to the point. Great speaker when it's on sale. Still great even at the non-sale price. ... show more
Reviewed in the United States on June 12, 2026 by emptystreets130

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