Description RMS: Sub8W+ Sat 4W*2 Subwoofer Size: 3” Sattellite Size: 2.5” Interfaces: Input: 3.5mm stereo earjack， Output: 2RCA sockets Manual functional controls: Power， Bass & Master Vol， LED  Distortion: ≤ 1% 1W 1kHz  Frequency: 55Hz– 20kHz  S/N: ≥ 70dB  Separation: ≥50dB (1KHz)  Front master volume and bass controls for easy adjustment