Power output: RMS R/L: 4.5W 2 SW: 12W Signal to noise ratio: 80dBA Frequency response: 80Hz~20kHz (±6dB) Input sensitivity: R/L: 300±50mV SW: 100±20mV Input type: AUX/USB/SD card Bass driver: 4 inch Treble driver: 2 3/4 inch