Ideal for smartphones mp3 players tablets laptops and any other audio device with a bluetooth connection or via a wired 3 5mm output powerful built in speaker for depth and clarity with advanced wirless audio technology built in li ion rechargable battery giving 5 6 hours useage at 70 volume simply twist the bassboomz to activate and release the bass expansion system delivering an impressive volume to size digital amplifier portable and pocket sized for your music on the go