Search  for anything...
Ultimate Ears

Ultimate Ears WONDERBOOM 4 Portable Waterproof Bluetooth Speaker with Big Bass and 360-Degree Sound, Dustproof Floating Speaker with 131ft (40m) Range- Black

  • Based on 952 reviews
Condition: New
Checking for inventory...

Notify me when this product is back in stock

$69.98 Why this price?
Save $30.01 was $99.99

Buy Now, Pay Later

As low as $11.66 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Unavailable
Fulfilled by Amazon
Available payment plans shown during checkout

Recently Viewed

Color: Black


Features

  • Surprisingly Bigger 360-Degree Sound: The WONDERBOOM 4 portable waterproof Bluetooth speaker features bigger 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 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
  • 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 Hz


Connectivity Technology: Bluetooth


Audio Output Mode: Stereo


Audio Output Mode: Stereo


Mounting Type: Freestanding


Enclosure Material: Plastic


Speaker Type: Outdoor


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


Antenna Location: For Computers, For Smartphones or Tablets


Controller Type: Battery Powered


Color: Black


Battery Average Life: 14 Hours


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


MP3 player: No


Specific Uses For Product: Gaming, Party, Travel


Unit Count: 1.0 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.


Brand: Ultimate Ears


Model Number: 984-001876


Model Name: Wonderboom 4


Built-In Media: Wonderboom 4 Black


Age Range Description: Teen and Adult


Number of Items: 1


Series Number: 4


UPC: 097855189943


Global Trade Identification Number: 43


Manufacturer: Logitech


Warranty Description: 1 Year Limited Hardware Warranty


Speaker Maximum Output Power: 10 Watts


Frequency Response: 75 Hz


Number of Audio Channels: 4 2


Connectivity Technology: Bluetooth


Wireless Technology: Bluetooth


Subwoofer Connectivity Technology: Wireless


Connectivity Protocol: Bluetooth


Battery Capacity: 14 Milliamp Hours


Audio Driver Type: Dynamic Driver


Audio Driver Size: 40 Millimeters


Number Of Circuits: 1


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great little portable speaker
Color: Black
The media could not be loaded. 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 Speaker Is Possessed by a Much Larger, Angrier Speaker
Color: Black
The Ultimate Ears WONDERBOOM 4 is built like a friendly little bean and sounds like it does CrossFit and drinks black coffee for fun. I turned it on and my house said, “Oh. We’re doing this now.” The bass showed up uninvited and started rearranging the furniture emotionally. The 360-degree sound is real. I walked in a circle around it like an idiot and the music followed me like a curse. I put it in the shower. Loud. I put it by the pool. Louder. I dropped it in the pool. It floated. Still yelling. I walked away from my phone. Then I walked farther. Then I forgot where my phone was. Music never stopped. This speaker is loyal to a fault and clearly doesn’t respect personal space. Battery lasts forever. Pairing takes half a second. Survives water, dust, and my playlist decisions. Five stars. If this thing gets any louder it’s going to start paying rent. ... show more
Reviewed in the United States on February 7, 2026 by 1Bama1
    • Audio Perfection
Color: Pink
These speakers are friggin awesome. Got one for each of my parents for their birthdays this year. The audio is crystal clear and it also gets very loud for its size without compromising the audio quality. Great for both music and podcasts etc. Also love that you can attach a carabineer to the speaker so you can hook it onto your pants or backpack etc and have the speaker effortlessly follow you around. The different settings/features are also really cool and handy. Would definitely recommend this product and honestly any product from the Ultimate Ears speaker line as in my personal opinion this line of speakers is the best line of portable speakers I know of or have ever heard. They're priced well too. I mean they aren't super cheap but they aren't overly expensive either, it's kinda right in that sweet spot. If you've got the money and you're looking for a portable speaker, look no further than this line because the sound quality and loudness (without distortion) you really won't find anywhere else especially for these prices. I know I'm starting to sound like a UE shill at this point lol but honestly I just really do love and admire their speakers and don't think they get the credit they deserve. Anyway hope this helps! ... show more
Reviewed in the United States on January 17, 2026 by Dgiberkeley
    • Big Sound, Small Package
Color: Blue
The Ultimate Ears Wonderboom 4 is a compact bluetooth speaker you can fit in the palm of your hand, but don't let its size fool you -- this thing pumps out loud, clear 360° sound with satisfyingly thumpy bass and greats mids and highs. It's sturdy, waterproof, has a forgivingly long wireless range, and it even floats in water, making it perfect for any situation from camping trips to pool parties, or just casual listening. I like that Ultimate Ears chose a simplistic look with bold colors for these speakers, and the silicone base helps ensure that they stay put. My only gripe is that the Outdoor and Podcast EQs kind of sacrifice some clarity to push the volume in their respective directions, but the standard EQ is so rich and the speaker is so outspoken that either problem these modes attempt to solve are really non-issues, and the fact you can pair up two of these speakers for full two-channel stereo is a big plus. In addition, the regular sound signature is so clear that you can crank the volume with no noticeable distortion. I also wish you could skip back a track with the onboard controls, but doing it on your device isn't that much of a hassle. For this price range and size, I'd say the Wonderboom 4 should be your first choice for a portable bluetooth speaker. ... show more
Reviewed in the United States on July 14, 2025 by F. Leone
    • EACH AND EVERY PENNY I SPENT WORTH IT.
Color: Black
Review Image by VK
Review Image by VK
Review Image by VK
Review Image by VK
I've been a die-hard fan of JBL and Sony speakers for ages, but the WONDERBOOM 4 totally blew me away! The sound quality is crystal clear - I mean, you can hear every single little and small beat! It's crazy how this tiny speaker packs such a punch, it's extremely loud and the battery life is on point. Super impressed and happy with my purchase! If you're looking for a budget-friendly outdoor Bluetooth speaker, look no further. Trust me, you won't regret it! ... show more
Reviewed in the United States on March 23, 2026 by VK

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for inventory...