speaker box for psp2000, for psp3000, pc, mp3, mp4,s DVD, TV Voltage:DC12-15V 2A Subwoffer: 15W(RMS) Speaker for PSP1. Specification:Voltage:DC12-15V 2ASubwoffer ... from PSP is cut off automatically then can play other MP3 music. Speaker for psp 2000, psp3000, pc, mp3, mp4, DVD, TV