Power output: 15W+8W*2 (RMS) Illuminated buttons Audio input jack for desktop PC/MP3 players and other audio devices RCA jacks for connecting with TV/DVD/VCD players USB / SD card reader / MP3 player / FM radio Subwoofer speaker: 4? 4 ohm Satellite speakers: 3?x2 4 ohm Frequency response: 120Hz~20 KHz (satellites) 20Hztilde170 Hz (subwoofer) Power supply: N220V, 50Hz/60Hz