Ultimate Ears WONDERBOOM 4 Waterproof Speaker
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact waterproof speaker built to survive drops and dunks, with real stereo pairing and dedicated modes for outdoor and podcast listening.
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ASIN: B0BRXJ9WTDModel: 984-001876Category: Portable Bluetooth Speakers
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Overview
A small, waterproof Bluetooth speaker with 360 degree sound, an IP67 rating for full submersion, and up to 14 hours of playtime on a charge. It floats, has a 131 foot wireless range, and pairs with a second unit for stereo.
Two dedicated modes sit on top of standard playback: an Outdoor Boost button that adjusts the sound for open-air listening, and a newer Podcast Mode aimed at making spoken vocals clearer than the default music tuning. The plastic housing uses at least 31% recycled material by weight, and the speaker is rated as drop-proof from 5 feet.
- IP67 waterproof, dustproof and floats
- Up to 14 hours of playtime, 131 foot wireless range
- Outdoor Boost and Podcast Mode listening presets
- At least 31% recycled plastic by weight
Who it's for
Pool, beach and shower use where a speaker might get wet, dropped or dunked. Not the choice for anyone wanting deep bass or a home-theater scale sound field, since the design favors portability and durability over output size.
Pros and cons
- IP67 sealed against dust and full submersion, and it floats
- 360 degree sound does not need to face the listener
- Up to 14 hours of playtime per charge
- Pairs with a second unit for true stereo
- Charges via USB-C cable that is not included
- Stereo pairing does not work together with the PartyUp multi-speaker mode
Performance notes
The IP67 rating means the housing is sealed against both dust and full submersion up to 1 meter for 30 minutes, which is what allows it to float and survive pool or beach use rather than just splashes. The 360 degree driver arrangement spreads sound outward instead of firing from one face, so placement in a room or outdoors matters less than with a directional speaker. Outdoor Boost re-tunes the output for open spaces where sound dissipates faster, while Podcast Mode narrows the EQ toward vocal clarity for spoken content.
Specifications
| Brand | Ultimate Ears |
|---|---|
| Model | 984-001876 |
Frequently asked questions
Can the Ultimate Ears WONDERBOOM 4 go underwater?
Yes, it is IP67 rated for submersion in up to 1 meter of water for 30 minutes, and it floats.
How long does the WONDERBOOM 4 play on a charge?
Up to 14 hours, charged over USB-C, cable not included.
Can I pair two WONDERBOOM 4 speakers together?
Yes, pressing the pairing button once doubles the sound, and pressing again gives true left and right stereo between the two units.