2.1 Channel Multi-Media Speaker 1- Output RMS(W): 30W+15W*2 2- 5.25'' Subwoofer; 3''+1.5'' Satellites 3- Impedance: 8Ohm(subwoofer) 8Ohm(satellites) 4- THDMax: 0.1 % 5- Frequency(HZ): 50Hz-200Hz(subwoofer) 120Hz-20KHz(satellites) 6- Magnetically Shielded with Remote Control