Ultron 66537. RMS rated power: 5 W, Peak Music Power Output (PMPO): 40 W, Frequency range: 130 - 16000 Hz. Connectivity technology: Wired, Headphone connectivity: 3.5 mm. Weight: 438 g. Dimensions (WxDxH): 140 x 75 x 70 mm, Audio output channels: 2.0, Power source type: USB