Genius SW-S2.1 200. Audio output channels: 2.1, RMS rated power: 6 W, Recommended usage: PC. Signal-to-Noise Ratio (SNR): 85 dB. Satellite speaker type: 1-way, Satellite speakers RMS power: 3 W, Satellite speaker impedance: 4 Ом. Subwoofer RMS power: 3 W, Subwoofer impedance: 4 Ом, Subwoofer driver size: 76.2 mm (3 "). Power source: AC