Edifier HCS 2330. Audio output channels: 2.1, RMS rated power: 53 W, Recommended usage: PC. Amplification device type: amplifier, Amplification device form factor: stand-alone, Amplifier output power: 28 W. Satellite speaker type: 2-way, Satellite speakers RMS power: 18 W, Satellite speaker frequency range: 48 - 20000 Hz. Subwoofer RMS power: 35 W, Subwoofer driver size: 165.1 mm (6.5 "). Power source: AC