GW Security Mini Microphone for CCTV Security Camera - Add-on Mini Audio Box for All Surveillance Cameras Which Need Audio Function (High Sensitive Microphone) One add-on mini audio box for all Camera which need audio function High Sensitive microphone and 12V power regulator built-in box Audio Output: Max 2.0 Vp-p; Power Supply: 12VDC ( 0.5V); Power Consumption: 10mA Storage Temperature: (-30C to +60C) ; Operating Temperature: (-10C to +45C) .