OrigAudio™ Volcano Compact Portable Speaker provides a speaker that erupts with sound. This compact, portable speaker packs a punch with a built-in bass expansion system. Simply untwist to provide the sound quality of a subwoofer. Rechargeable lithium ion battery. Fits in your hand or pocket for easy travel. Use multiple speakers to connect together and create an endless stream of music and surround sound. 2.5-watts of power provides up to 89 dB of sound. Can be used with DC adapter or USB for recharging. Offers a play time of 8 to 10 hours. Measures 2 3/5" diameter x 2 1/2" H. Imported.