Philips DS8550, 2.0 channels, 15 W, Digital, 5 h, 484 mm, 220 mm Philips DS8550. Audio output channels: 2.0 channels, RMS rated power: 15 W. Volume control: Digital. Battery life (max): 5 h. Package width: 484 mm, Package height: 220 mm. Compatible products: iPad iPhone, iPhone 3G, iPhone 3GS, iPhone 4 iPod, iPod mini, iPod w/ CD, iPod 5G, iPod nano 2G,..., Dimensions (WxDxH): 421 x 139 x 158 mm, Package length: 15.8 cm