PoE Power Supply, Plug & Play, Easy Installation: This security camera set adopts PoE (Power over Ethernet) technology, allowing data and power to be transmitted simultaneously via a single LAN cable. No additional power cables or outlets are required, making installation easy and quick. The set includes an NVR, wired PoE security cameras, and LAN cables; you only need to prepare a display and an HDMI cable to complete the installation. It's easy to set up even for beginners, making it ideal for homes and commercial facilities. Remote Monitoring and Local Recording with No Monthly Fees: The system allows for local recording and monitoring even without a network connection. After connecting to the network, you can use the smartphone app "Elink Defense" to check real-time monitoring footage from anywhere. You can easily keep track of family, pets, and the situation in the monitored area. 3 Night Vision Modes, Selectable to Suit Your Needs: The camera offers three night vision modes: black and white, color, and smart dual-light. The default is the smart dual-light mode, which automatically switches to full-color night vision when detecting a person or vehicle, providing detailed images. When the subject leaves, it returns to black and white mode, saving energy and being efficient, suitable for indoor and outdoor monitoring. Two-Way Audio Communication, Real-Time Interaction: The camera has a built-in microphone and speaker, allowing for real-time voice communication with family, colleagues, and visitors through the smartphone app. This enhances interaction and security (Note: This function is only supported by the smartphone app and not by the NVR). Metal Outer Shell, IP67 Dustproof and Waterproof Performance: The surveillance camera adopts a robust metal outer shell and features IP67 dustproof and waterproof performance. It can withstand rain, snow, dust, and extreme temperatures (-20°C to 50°C), making it ideal for indoor and outdoor use. It guarantees stable operation even in harsh environments. Smart AI Person/Vehicle Detection, High-Accuracy Alerts: The system is equipped with a smart AI person/vehicle detection function. The set includes two 5-megapixel ultra-high-definition security cameras and can be expanded to up to 4 cameras. The built-in 2TB hard drive (expandable to 8TB) allows for 24-hour recording. When the hard drive capacity is insufficient, it automatically overwrites the oldest data to continue recording.