【Plug and Play PoE System】Simple PoE connection makes it easier to set up and install your home security camera system. The digital signal will keep a real 8mp high-definition image via ethernet cables. 【Remote Access & Motion Detection & Instant alerts】 Free app for live view & Playback on Mobile Phone with Wi-Fi anywhere anytime.You can customize a specific motion detection zone in each camera to minimize false alerts. 【4pcs 5MP Weatherproof Metal Bullet Camera,120ft Night Vision】These Camera use Aluminum Metal materials, Can be installed in outdoor or indoor place.get a sharp and crisp image day or night with the camera's automatic IR-CUT filter Up to 120ft night vision in total darkness and 160ft Night vision in ambient light.More than 3.0Lux the night vision is color. Aluminum weatherproof housing cameras can be Used indoors and outdoors. 【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. 【24/7 Recording with 2TB Hard Drive & Live View Share】Built-in 2TB Security Grade Hard Drive, users are provided reliable 24/7 recording.Support long continuous recording and backup.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. And it supports remote access, live view and playback by multiple family members.