JBL On Stage III, On Stage. Audio output channels: 2.0, RMS rated power: 20 W, Frequency response: 70 - 20000 Hz. Input voltage: 230 V, Battery type: AAA, Battery life (max): 12 h. Dimensions (WxDxH): 150 x 150 x 38 mm, Weight: 500 g. Colour of product: Black