Pump up any party with the Ultimate Ears HYPERBOOM Bluetooth® speaker. It's IPX4-rated to be splash-proof, making this wireless speaker great for pool parties. The rechargeable battery keeps your music going for up to 24 hours. One-touch controls allow you to play, pause, and skip tracks, and adaptive EQ automatically customises your sound to the space. Speaker Features Bluetooth® technology Up to 24 hours of life on the rechargeable battery Music-sharing feature Delivers incredibly booming bass and crystal-clear sound Adaptive EQ automatically customises the sound to suit the space Spill-proof, splash-proof design with IPX4 rating