【2MP 1080P Bullet Camera with Microphone】-- With built-in microphone in the camera It can support a one-way audio, you can hear the other party talking, but not the conversation.And you need to make sure your DVR support Audio input. | 【Compatibility】-- This is HD-TVI Security Camera,It only Compatible with HD-TVI Analog DVR Systems,if you want Audio Recording,please make sure you DVRs support Audio input.But It work well with ZOSI DVR (Model:ZR08VN00,ZR08VN10, ZR08VN20 | 【120ft Night Vision】-- Built in 36pcs IR LEDs, Get a sharp and crisp image day or night with the camera's automatic IR-CUT filter. Up to 120ft night vision in total darkness and 160ft Night vision in ambient light. More than 3.0Lux the night vision is color. | 【IP66 Weatherproof,Indoor and Outdoor use】Aluminum metal vandal proof & waterproof can withstand the toughest of outdoor conditions , adjustable 3-axis camera stand, cable through bracket for hassle free use in rainy or snowy days. | 【Not Include CCTV Cable and Power Supply】 1, this is a hard-wired camera, it need to connect the cctv cable and power supply(Not included). 2, this camera could not work seperately,it need to connect to the DVR to work