USB / SD 5 Channel 70V / 100V / 8 Ohm 120W PA-120 Audio Amplifier Features Brand: Winford Model: PA-120 Power: 120W Audio inputs: USB, SD card Microphone inputs: 2x 6.35mm audio jack  Aux input: -10dB Mic input: -55dB Treble / Bass: +/- 15dB Output: 4 - 16 Ohm 70 / 100V Distortion: 1KHZ <0.1% Noise: -45dBdB Signal to noise ratio: 90dB Power supply: 110V 3/5/7 / 15A 220V 2/3/5/7 / 10A Power socket: Schuko Number of channels: 5 Dimensions Height: 9cm Maximum width: 48cm Minimum width: 43cm Maximum depth: 35.5cm Minimum depth: 30.5cm