. LED Display, Supports USB pen drive and SD/MMC card . Built-in FM Blue LED Power indicator, Fully functional remote control, FM frequency scan range: 87 – 108MHz . Output power (RMS):20W + 10W x 4, Frequency response:20Hz – 20KHz; FM frequency scan range: 87 – 108MHz; FM storage memory: 40 channels . Impedance Subwoofer drive :4 Ohms Satellite drive : 4 Ohms . Sensitivity : 500mV, S/N Ratio : ≥ 72dB, Separation : ≥ 45dB, Subwoofer drive size . Remote sensing distance ≥ 6meters. Power consumption : 70W; Input power : AC 230V / 50Hz