Wireless Streaming via Bluetooth, 360° Sound, Twin 2" Drivers, Two 2" x 4" Passive Radiators, Deep Accurate Bass, Up to 15 Hours of Playback, IP67 Rated, Compact and Portable Design, Hang Loop. Get quality sound in any environment with the night black Ultimate Ears BOOM 3 Portable Wireless Bluetooth Speaker. This portable speaker provides clear and balanced 360? audio via twin 2 drivers and twin 2 x 4 passive radiators. You also get rich deep bass texture that's true to your music without exaggeration or distortion.No matter where you enjoy your music the built-in rechargeable lithium-ion battery provides up to 15 hours of continuous playtime. Thanks to its rugged design you can use this speaker almost anywhere outdoors. With an IP67 rating this speaker is dust sand and waterproof and can withstand immersion in liquids up to 3.3' deep for up to 30 minutes.