Power output: R/L: RMS 4.5Wx 2 SW: RMS 12W Distortion: 0.5% Signal to noise rate: 80dBA Frequency response: 80Hz~20KHz (±6dB) Input sensitivity: R/L: 300mV±50mV SW: 100mV±20mV Input type: AUX/USB/SD card/FM Bass unit: 4 inch Treble unit: 2 3/4 inch Adjustment: Side control panel, remote control