Specification: Features:_x000D__x000D_This security microphone for CCTV security camera is compatible with devices that accept AV input, like DVR, VCR, TV, etc. _x000D_Used to increase a microphone's low output voltage to a stronger usable level. _x000D_High Sensitivity Audio Sound Pick Up. _x000D_Sensitivity adjustable. _x000D_Low noise, high-fidelity. _x000D_Wide monitoring range of about 10-50 square meter. _x000D__x000D_Specifications:_x000D_Color: Black_x000D_Material: Plastic_x000D_Voltage: DC 9-12V_x000D_Current: 15mA_x000D_Output Impedance: 600ohm_x000D_Monitoring Range: 10-50 Square Meter_x000D_Connector: Red (DC12V Input), Black (DC12V Output), White (RCA)_x000D_Cable Length: About 42cm_x000D_Package Weight: About 29g_x000D__x000D_Package List:_x000D_1 * Audio Pickup Device (Other items in the pictures are not included.) Features: 1This security microphone for CCTV security camera is compatible with devices that accept AV input, like DVR, VCR, TV, etc. 2Used to increase a microphone's low output voltage to a stronger usable level. 3High Sensitivity Audio Sound Pick Up. Sensitivity adjustable. 4Low noise, high-fidelity. 5Wide monitoring range of about 10-50 square meter. PackageList: