Arctic Cooling S151. Audio output channels: 2.1, Recommended usage: PC. Satellite speakers RMS power: 3.5 W, Satellite speaker impedance: 4 Ом. Subwoofer RMS power: 10 W, Subwoofer impedance: 6 Ом. Power source: AC. Satellite speaker dimensions (WxDxH): 160 x 86 x 85 mm, Subwoofer dimensions (WxDxH): 244 x 203 x 155 mm, Set weight: 1400 g