SM-1 / DC-PLUG module is designed for listening sounds in the environment and is designed to work with DVRs. The entire module is the diameter of the cable to which it is connected, so it can hide virtually anywhere. The device is equipped with the signal connector Cinch (RCA) and a power connector 2.1 / 5.5mm Specifications: - Audio frequency: 200 Hz ... 10 kHz - Area covered: 5 ... 150 m² - Power: 6 ... 12 V - Current consumption: 12 mA - Impedance: 600 Ω