Labtec Pulse 386. RMS rated power: 17 W, Peak Music Power Output (PMPO): 34 W, Frequency range: 55 - 15000 Hz. Compatible operating systems: Windows & Mac. Audio output channels: 2.1, Subwoofer dimensions (WxHxD): 185 x 145 x 135 mm, Surround speaker dimensions (WxHxD): 70 x 68 x 180 mm