In boom 2 we?ve Perfected the iconic cylindrical design we pioneered to deliver immersive, stereophonic audio that radiates evenly in all directions.boom 2 was born to get wet and is waterproof. boasting an insane ipx7 water and dustproof rating.customizable eq select the best sound for different occasions with 4 different presets and a customized tuner.power rechargeable lithium-ion battery for up to 15 hours of battery life between micro usb charges.audio maximum sound level 90dba.frequency range 90hz 20khz.drivers two 2? Drivers and two 2? X 4? Passive radiators.wireless capabilities pair up to 8 bluetooth enabled source devices connect up to two source devices at the same time. mobile range of play is up to 30m.compatibility for audio playback smartphones, tablets and other devices that support bluetooth and bluetooth smart® wireless audio