... usb,memory card and FM Subwoofer:1,Power: 60W 2,Speaker unit: 8 inch3,Impedance :4-8Ω4, ... 6.Product size: 22*37.5*39.5CM Satellites:1,Power: 15W * 5 2, Speaker unit: 3"* 5 + 10" treble 3, ... Impedance :4-8Ω4, Sensitivity:85dB 5, Frequency response:120HZ ... total volume of re-boot back to themid-point 2, Infrared remote control function3, CD.DVD.AC-3 ...