Tube Green 90 - 20000 Hz Wireless Bluetooth 3.5 mm connector AUX in Built-in Lithium-Ion (Li-Ion) 11.52 Wh 3200 mAh 15 h 1 pc(s) UE BOOM 2 pleads insanity. And it's guilty. It's the 360-degree wireless speaker that blasts loud, insanely great sound with deep, powerful bass in every directioneverywhere you go.360SOUNDUE BOOM was designed to blast the same insanely great sound and deep, powerful bass to every corner of the party. Because it's only a party when everyone can hear the music.SOUND FOR ANY ADVENTURERain or shine, rage, riot, party and bring the beats to your favorite beaches, trails, caves and climbs.CONNECT MULTIPLE SPEAKERSMake things epic. Wirelessly Double Up with a second Ultimate Ears speaker (UE BOOM 2, UE ROLL, UE MEGABOOM, UE BOOM) using the UE BOOM 2 app. Loudspeakers Subwoofer driver diameter 4.44 cm Driver diameter 4.5 cm Number of speakers 1 Audio Sensitivity 90 dB Frequency range 90 - 20000 Hz Ports & interfaces USB charging port Yes Near Field Communication