Philips AS851. Audio output channels: 2.0, RMS rated power: 30 W, Driver size: 76.2 mm. Headphone connectivity: 3.5 mm, Bluetooth version: 2.1+EDR, USB connector type: micro USB A. Power source type: AC, Input voltage: 100 - 240 V, Input frequency: 50/60 Hz. Width: 421 mm, Depth: 140 mm, Height: 157 mm. Cables included: AC