Ultimate Ears BOOM 2 Cherry Bomb Wireless Mobile Bluetooth Speaker (Waterproof and Shockproof) Insanely good, loud 360degree sound with deep bass Portable design so you can bring the music anywhere Waterproof*, shockproof, designed for adventure (* IPX7 rated waterproof up to 30 minutes and a depth of one meter) Tap the speaker to play, pause or skip songs Companion app and overtheair speaker updates Maximum Sound Level: 90dBA. Frequency Range: 90Hz  20kHz. Drivers: two 45mm (1 3/4") active drivers and two 45mm X 80mm (1 3/4" x 3") passive radiators These are FCC regulated products: FCC ID JNZS00151