[4K Ultra HD and Color Night Vision] ZOSI 4K Ultra HD CMOS Image Sensor allows the camera to capture more light, which improves color, contrast and low-light performance. It can record everything with sharper details with the high pixel count and be able to digitally zoom into far away objects without losing any quality in 4K resolution. | [Smart Human Motion Detection] This camera stays alert and is ready to respond to any potential danger through an intelligent light alarm system, triggered by human motion events or controlled manually, to eliminate trouble. At the same time the Instant notifications and email alerts will be pushed to your phone. | [Two Way Audio & Remote Access]The PoE IP camera Built-in mic and speaker let you stay in touch with your household. So you can talk to your kids or tell your dog to stop barking, or say hello to the delivery man through the Free Zosi Smart App. Free app for live view & Playback on Mobile Phone with Wi-Fi anywhere anytime. | [8 Ports NVR Upgrade 16CH Expandable]This 4K 8-port NVR can expand up to 8 PoE cameras. If you additional purchase a PoE switch (not included), you can update to 16 channel system. It provides you with the flexibility to expand additional cameras. You can add more (ZOSI only) 8MP, 5MP or 4MP POE bullet or dome cameras. | [Continuous 24/7 Recording] Built-in 2TB security-grade hard drive provides reliable 24/7 recording for users. It supports extended periods of continuous recording and USB backup. ZOSI Smart PoE security camera system make your home safe.