The Ultimate Ears WONDERBOOM 4 is a small speaker that refuses to sound like one. It’s a plastic puck that delivers 360-degree audio with surprising bass for its size. The real trick is that it floats. You can toss it in a pool, drop it in the sand, or hang it from a shower caddy without worry. The IP67 rating means it’s waterproof, dustproof, and shockproof. It survives drops and splashes that would kill most portable speakers.

Battery life hits 14 hours at moderate volume. That’s enough for a full day at the beach or a weekend camping trip. The sound fills a room evenly, no matter where you place it. It pairs quickly with phones, tablets, or laptops via Bluetooth. The range holds steady at about 40 feet through walls. It’s not the loudest speaker in this class, but it’s loud enough for a backyard party or a noisy kitchen.

The plastic shell feels durable, not premium. You won’t mistake it for a high-end audio component. The lack of a built-in microphone means no hands-free calls. If you need speakerphone, look elsewhere. For a rugged, waterproof companion that prioritizes portability and durability over audiophile detail, the WONDERBOOM 4 delivers exactly what it promises.