【4K 8.0MP Ultra High Definition and Color Night Vision】Four times the resolution of 1080P.This Ultra HD 4K CMOS Image Sensor allows the camera to capture more light,which improves color,contrast,and low-light performance.In 4K resolution.Record everything with sharper details with the high Pixel count and be able to digitally zoom into far away objects without losing any quality. | 【Person Vehicle Detection& Smart Alerts】Precisely Detect Person Vehicle,The camera is smart enough to detect people or vehicles from other objects and safely reduce unwanted notifications.you will receive instant App push notifications,email alerts and sound alarms (siren) when motion events are detected. | 【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. | 【4K 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 2MP POE bullet heads or dome cameras. | 【Continuous 24/7 Recording with 2TB Hard Drive】Built in 2TB Security Grade Hard Drive,users are provided reliable 24/7 recording.Support ultra-long continuous recording and backup by USB. NVR can be set to automatically overwrite the oldest internally stored footage or you can transfer those video files by USB to a memory stick or external Hard Drive.