Philips SBD7000/97, 4 W, 80 dB, 4 Ω, 100 - 20000 Hz, iPhone, Black Philips SBD7000/97. RMS rated power: 4 W, Sensitivity: 80 dB, Impedance: 4 Ω. Apple docking compatibility: iPhone. Product color: Black, Magnet type: Neodymium. Power source type: Battery, Battery type: LR6, Battery voltage: 1,5 V. Package width: 284 mm, Package depth: 284 mm, Package height: 158 mm