Philips RWSS5510 Wireless Rear Audio module. Receiver dimensions (WxDxH): 130.5 x 126 x 126 mm. Power consumption (standby): 0.45 W. Package weight: 1.75 kg. Power requirements: 100-240VAC, 50/60Hz, Frequency response: 5.8 G, Packaging depth: 216 mm