What do reviews say about waterproof?

IP67 rated, drop-proof and it floats, per both expert reviews.

What do reviews say about battery?

Rated 14 hours; TechRadar found it can last longer and 51 buyers praise it.

What do reviews say about app?

It does not work with the UE Boom app, so EQ cannot be changed.

Phones & Audio · Speakers · 328 reviews · 3 sources

Ultimate Ears WONDERBOOM 4

Best for: pool and beach daysBudget

A small, tough, floating speaker with punchy sound for the price. It has no app and barely improves on the Wonderboom 3.

Tracking since Sep 2026

Buy if

You want a speaker for the pool
You want good value

Skip if

You want app EQ controls
You own a Wonderboom 3

How it scores

Value9.0

Sound7.6

Battery7.1

Price

$99.99

You pay for: Rugged and floats, great value

Reviewed Sep 2026 · 0 new reviews since · score unchanged

What people love

Most mentioned by reviewers

Sound qualityPunchy, clear for its size

PortabilityLight, clips onto a bag

Battery lifeAbout 14 h per charge

What people complain about

Most mentioned by reviewers

Minor upgradeMostly adds USB-C charging

No app supportNo EQ tweaks from a phone

Distorts when loudSound suffers at max volume

Reviewers disagree on

Bass is surprisingly bigTop volume makes it buzz

Alternatives

Same price · $99.99

Ask about this product

Sources

Best Buy
TechRadar
Tom's Guide
Reviewed Sep 2026

AI summary of public reviews, not a recommendation.