Original Power Supply PSM36W-201 for Bose SoundDock I +/- 18 V Series I AC Adapter White Bose SoundDock I Power Supply PSM36W-201 or PSM36W-208 Fast shipping from Seattle Output: +/-18 VDC 1 A with Four Prongs Plug-in For Bose SoundDock I (Series I, Original, First Generation) Input 100~240 VAC