Bosch DCNM-MMD2. Nominal input level: 80 dB. Maximum output amplitude: 90 dB. Signal-to-Noise Ratio (SNR): 66 dB. Input voltage: 48 V, Power consumption (typical): 12 W. Dimensions (WxDxH): 12.3 x 6.89 x 2.95"" (312 x 175 x 75 mm), Weight: 4.08 lbs (1.85 kg)