LOEWE Wireless Rear I Sound. Frequency range: 20 - 20 Hz, Impedance: 6 Ом, Sensitivity: -3 dB. Amplifier output power: 2 W. Headphone connectivity: 3.5 mm. Power consumption (standby): 1 W. Dimensions (WxDxH): 330 x 53 x 181 mm