Bosch DCNM-WD. Nominal input level: 80 dB. Maximum output amplitude: 80 dB, Output impedance: 32 Ω. Signal-to-Noise Ratio (SNR): 90 dB. Input voltage: 7.5 V, Power consumption (typical): 4.5 W. Dimensions (WxDxH): 10.2 x 5.47 x 2.83" (259 x 139 x 72 mm), Weight: 20.8 oz (590 g)