Technaxx MusicMan. Audio output channels: 2.0, RMS rated power: 6 W, Frequency response: 150 - 18000 Hz. Headphone connectivity: 3.5 mm. Power source type: Battery, USB, Battery technology: Lithium Polymer (LiPo), Battery voltage: 5 V. Dimensions (WxDxH): 170 x 60 x 75 mm, Weight: 270 g. Cables included: AUX, USB