Big Sound. Small Footprint. Ready for Anything.
Don’t let its compact size fool you. The Ultimate Ears WONDERBOOM 4 delivers surprisingly massive, bass-heavy 360° sound engineered to thrive outdoors. Featuring dual active drivers and passive radiators, it pumps out crisp, booming audio that fills any space. Heading outside? Just tap the Outdoor Boost button to crank the audio up to a roaring 87 dBC, specifically tuned to cut through wind and ambient noise.
Built for the Adventure
Weighing in at just 420 grams and equipped with a handy, built-in bungee loop, the WONDERBOOM 4 is designed to clip onto your backpack, bike, or belt loop and go. Whether you're hiking, lounging poolside, or hosting a backyard BBQ, its ultra-rugged design is ready to withstand the elements.
Untethered Freedom
-
14 Hours of Beats: Keep the party going from sunrise to sunset with up to 14 hours of continuous battery life on a single USB-C charge.
-
Massive 40-Meter Range: Wander freely without losing your connection. With an extended 40-meter Bluetooth range, your phone can stay safely in your pocket while you dance.
-
Double the Sound: Want a true stereo experience? Wirelessly pair two WONDERBOOM 4 speakers from a single source device to double the volume and the fun.
Mindfully Crafted
Great sound shouldn’t cost the earth. The WONDERBOOM 4 is designed with sustainability in mind, utilizing a minimum of 31% post-consumer recycled plastic in its total plastic components. Look good, feel good, and sound amazing.
Product Specifications
-
Dimensions: 104 mm (H) x 95.3 mm (Diameter)
-
Weight: 420 g (Speaker only)
-
Audio Tech: Two 40 mm active drivers, two passive radiators
-
Max Sound Level: 86 dBC (Normal) | 87 dBC (Outdoor Boost)
-
Connectivity: Bluetooth (A2DP profile supported for smartphones, tablets, and laptops)
-
Charging: USB-C port
What’s in the Box?
- ULTIMATE EARS WONDERBOOM 4 Speaker
- Attached Bungee Cord
- USB Charging Cable
- Quick Start Guide (printed right inside the box to save paper!)
