iHome iBT4GC Bluetooth Rechargeable Boombox with FM Radio (Gray) SRS TruBass digital signal processing and Bluetooth technology combine to recast a classic for the digital era Enjoy your music on the go with the internal battery, or charge the battery while playing music with the 100V-240V universal voltage AC adaptor Send digital audio wirelessly to iBT4 from your iPad, iPhone, and iPod touch, Android, Blackberry or other Bluetooth-enabled audio device Aux line-out jack to connect multiple speakers Digital tuning FM radio with telescoping antenna