Edifier MP300plus. Audio output channels: 2.1, RMS rated power: 22 W, Recommended usage: PC. Amplification device type: amplifier, Amplification device form factor: built-in, Total Harmonic Distortion (THD): 10 %. Satellite speakers RMS power: 7 W, Satellite speaker frequency range: 230 - 20000 Hz, Satellite speaker mid-range driver size: 38.1 mm (1.5 "). Subwoofer RMS power: 15 W, Subwoofer frequency range: 45 - 200 Hz, Subwoofer driver size: 50.8 mm (2 "). Power source: AC