iCraig 2.1 Channel Tower Speaker System w/Remote, Sub-Woofer & Docking for iPhone/iPod 3.5mm Aux In (CHT907) Power and Charges Most Dockable iPhone/iPod models - Compatible with Most Dockable iPhone/iPod models Built-In 1 Sub-Woofer (20W RMS) and 4 High powered speaker (4 x 5W RMS) System, Total Output Power : 40W RMS Digital Volume Control - Ready light and blue source lights - Aux In Audio for TV and other devices (Left and Right Audio Jack) - Aux In Jack 3.5 mm for MP3 etc Remote Control the iPod/iPhone function - AC Operated