MODEL: S-507 Specifications: THD+N (Amplifier): <=0.5% (satellite, @ PO=5W ) Input Port: 5.1 channel RCA Line-in Controller: Controller: Infrared remote controller, main volume, front ,rear, center, subwoofer, mute cd/DVD and power. Power Requirement: 220V-240V ~ , 50/60Hz (for Model European/China/Korea/South America, etc.) 100V-120V ~, 50/60Hz (for Model USA/Canada/Japan ) MAX Power Consumption: 45W Features info: wood enclosures, including the satellites. Magnetically shielded satellite drivers, no need to worry about the screen nearby. 5.25 inch Long-Throw super woofer with 20W RMS high power output amplifier. 3 inch mid-range driver every satellite. digital volume IC. LED wide displayer, Infrared remote controller and front panel key controls. High-power drive, 5.1 channel inputs, Dolby Digital(AC-3) ready, DTS ready For Use With: Multimedia Computer (high quality 5.1 sound card) or CD player, MD, DVD player with 5.1ch or 6.1ch decoder, etc.