Compatibility This HD-TVI security camera is only compatible with HD-TVI analog DVR systems. For audio recording, ensure your DVR supports audio input. However, it works perfectly with ZOSI's new DVR recorder. 2MP HD Bullet Camera with AudioThe camera has a built-in microphone, no speaker, and supports one-way audio only. You can hear the other party speaking, but can't have a two-way conversation. 1080P high resolution provides clear images day and night. Night VisionBuilt-in 36pcs IR LEDs, with the camera's automatic IR-CUT filter, clear images can be obtained both day and night. Up to 100ft night vision in total darkness and 120ft Night vision in ambient light. It provide color video during the day and black-and-white video at night. IP66 Weatherproof, Indoor/Outdoor UseAluminum 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.