Genius SW-U2.1 200. Audio output channels: 2.1, RMS rated power: 6 W, Recommended usage: PC. Satellite speaker type: 1-way, Satellite speakers RMS power: 2 W, Satellite speaker frequency range: 20 - 20000 Hz. Subwoofer RMS power: 2 W, Subwoofer impedance: 4 Ом, Subwoofer driver size: 76.2 mm (3 "). Power source: USB. Satellite speaker dimensions (WxDxH): 82 x 110 x 67 mm, Subwoofer dimensions (WxDxH): 116 x 195 x 227 mm