Product information:Output power: 3W * 2Speaker impedance: 40Frequency response range: 90hz ~ 20KHzProduct size: 10cm * 9cmPower supply: 5V 1a (USB)Signal to noise ratio: ≥ 60dBConductor length: About 130cmDistortion: ≤ 0.3% 6 (1W 1kHz)Input sensitivity: 600 ± 100mV