NGS Hot Spring 2.1. Audio output channels: 2.1, RMS rated power: 28 W, Recommended usage: Home theatre. Amplifier/receiver input interface type: 3.5 mm jack. Satellite speaker type: 2-way, Satellite speakers RMS power: 14 W, Satellite speaker frequency range: 20 - 20000 Hz. Subwoofer RMS power: 14 W, Subwoofer frequency range: 20 - 20000 Hz. Power source: AC