Balanced 360-Degree Sound: The WONDERBOOM 4 portable waterproof Bluetooth speaker features 360-degree sound in a petite package; boosted sound for up to 14 hours of playtimeOutdoor Boost and Podcast Mode: Engineered for full stereo sound; tap the Outdoor Boost button for outdoor environments; use the new Podcast Mode to make vocals sound rich and clear14 Hours of Boom: With a rechargeable battery that lasts throughout the day, this waterproof portable speaker booms on with up to 14 hours of playtime, so you can soak up every moment; Charging via USB-C cable (not included)Waterproof, Dustproof, and Floatable: IP67-rated this Bluetooth waterproof speaker can be submerged in 1m of water for 30 min; protected from dust; ideal for the pool, beach, or showerDouble Up for Stereo: Pair up two WONDERBOOM 4 portable Bluetooth speakers for even bigger sound; press once to double up; press again for true stereo from both speakers, with left and right channels (not compatible with PartyUP)Durable Wireless Speaker With Range: 131 feet (40 meters) of range so youre free to roam; plus its dirt-resistant and drop-proof (1) with a handy loop so you can take it with youMade With Recycled Plastic: Plastic parts in the WONDERBOOM 4 wireless Bluetooth speaker include a minimum of 31% post-consumer recycled plastic by weight(1) Drop-tested from 5 ft / 1.5 m
Brand: Ultimate Ears
Type: Portable Speaker
Connectivity: Bluetooth
Features: Waterproof
Buy and sell with athletes everywhere.
Join more than 1 million athletes buying and selling on SidelineSwap. Save up to 70% on quality new and used gear, sold by athletes just like you.
Shop safely with our buyer guarantee.
Every purchase is protected by our buyer guarantee. If you don’t receive your item as advertised, we’ll provide a full refund.
Quick shipping and tracking.
Most orders ship via USPS Priority Mail (1-3 business days once the item is shipped by the seller). We provide sellers with a prepaid shipping label, and buyers receive tracking notifications until the item arrives at your doorstep.
Save money. Save the planet.
When you save big on high-quality used gear, you’re also keeping more gear on the field and out of a landfill.
Our community is built on trust.
Sellers receive feedback on every transaction, so you can feel confident before you purchase. Easily message the seller with questions about your item at any time.