ACE IX270. Audio output channels: 2.1, RMS rated power: 6 W, Recommended usage: PC. Satellite speakers RMS power: 4 W, Satellite speaker frequency range: 150 - 20000 Hz, Satellite speaker tweeter size: 50.8 mm (2 "). Subwoofer RMS power: 4 W, Subwoofer frequency range: 20 - 150 Hz, Subwoofer driver size: 101.6 mm (4 "). Power source: AC. Satellite speaker dimensions (WxDxH): 124 x 176 x 154 mm, Subwoofer dimensions (WxDxH): 135 x 81 x 154 mm