【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. 【4pcs Weatherproof Metal Dome Camera,80ft 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 80ft night vision in total darkness and 130ft Night vision in ambient light.More than 3.0Lux the night vision is color. 【Stable & Lossless Video Quality】Unlike CCTV DVR system, videos from the IP camera system will not be degraded or destroyed by cables. The digital signal will keep real 5mp high definition image via 300ft CAT6 ethernet cables. You will have no worry about the coaxial cable quality for NVR and analog cameras that will affect much on its image, even within 100ft. 【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. 【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.