RELIABLE 24/7 SERVICE: Anpviz brand has always been a positive attitude to all customer. If you have any questions or suggestions about this 3K TVI Turret Dome Security Camera, please contact Anpviz 's friendly 24/7 customer support team through. We will proactively resolve the issue within 24 hours of receiving the information. IP67 WATERPROOF: This 3K TVI Camera boasts an IP67 protection rating, purpose-built to tackle the toughest weather, be it heavy downpours or freezing cold and scorching heat. It can withstand extreme conditions from -20 degrees Celsius to 60 degrees Celsius, ensuring reliable performance. BUILT-IN MICROPHONE: Enhance surveillance with the integrated microphone, capturing audio alongside video. Receive comprehensive audio information.Note: Voice functionality requires a connection to an Anpviz DVR or an TVI DVR with a resolution of 3K or higher. 3K 4-IN-1 SECURITY CAMERA: This 3K CCTV camera supports TVI, AHD, CVI, and CVBS signals, allowing you to seamlessly integrate it with Anpviz or third-party DVRs (requires a 3K or higher resolution DVR) for 24/7 recording. Note: The camera defaults to 3K TVI; if not displaying when connected to a third-party 5MP or 4K DVR, switch the camera signal to AHD 5MP for connection. SMART DUAL-LIGHT CAMERA: This 3K analog camera offers three night vision modes for your choice: Intelligent Light/White Light/Infrared Night Vision. As soon as it detects a person or vehicle, the black and white night vision mode switches to color. Infrared night vision extends up to 25 meters, while white light night vision reaches up to 20 meters. Note: To enable dual-light functionality, you'll need an Anpviz DVR with AI capabilities; otherwise, it operates in infrared mode.