Philips DS9, 2.0 channels, 50 W, 85 dB, iPad, iPhone, iPod, Classic, Flat, Jazz, Pop, Rock, Digital Philips DS9. Audio output channels: 2.0 channels, RMS rated power: 50 W, Signal-to-Noise Ratio (SNR): 85 dB. Apple docking compatibility: iPad, iPhone, iPod, Equalizer modes: Classic, Flat, Jazz, Pop, Rock. Volume control: Digital, Driver unit: 0.748" (1.9 cm). Power source type: AC, AC input voltage: 100 - 240 V, AC input frequency: 50 - 60 Hz. Cables included: AC