Ultimate Ears WONDERBOOM 4 hits its lowest Amazon price yet

Aug 12, 2026 — 2:28 PM ET

Pool days, beach trips, and weekend getaways are a lot better with a speaker that can handle water, sand, and being tossed in a bag. The Ultimate Ears WONDERBOOM 4 fits that job well, and it is now on sale at Amazon for $64.99. That price is down from the $79.99 recommended retail price, representing a 19% discount. It’s also the first time this speaker has gone on sale on Amazon.

The WONDERBOOM 4 is a compact Bluetooth speaker built for travel and outdoor use. It emits 360-degree sound, so the music spreads in every direction rather than coming from one side only. It is waterproof, dustproof, and even floats, which makes it a strong pick for the pool or the shore. Battery life is listed at up to 14 hours, and it charges over USB-C.

For a bigger sound, you can pair it with another WONDERBOOM 4, or even a WONDERBOOM 3, for stereo or double-speaker playback. Reviews also look strong here, with a 4.4 out of 5 rating, helped by praise for its balanced sound, portable size, and rugged build.

For anyone who wants a small speaker that is ready for summer plans and everyday carry, this Amazon deal makes the Ultimate Ears WONDERBOOM 4 easier to grab.