JVC Portable Audio System, 2.0 channels, 4 W, Black, AC, AA, 9 V JVC Portable Audio System. Audio output channels: 2.0 channels, RMS rated power: 4 W. Product color: Black. Power source type: AC, Battery type: AA, Battery voltage: 9 V. Weight: 24.7 oz (700 g). Compatible products: iPod, Dimensions (WxDxH): 13 x 2.8 x 3.86" (331 x 71 x 98 mm)