Οutput power : 5W+3W X 2WRMS Signal to Noise Ratio : 60dB Frequency: 90Hz-20kHz Distortion: 0.3% (1W 1KHz) Input sensitivity : 600 -100 MV Speaker impedance : 4Ω Power : USB Compatible : PC/CD/DVD player /TV/Cell Phone / Tablet / MP3 Player