ZOSI 8CH 1080N HD TVI DVR 1280TVL HD Security Camera System with 8 Indoor/Outdoor Waterproof 120ft Night Vision Security Cameras 1TB HDD Support 3G Smartphone View and Remote Access H.264 8CH 1080N HD-TVI Video Recorder DVR NO hard disk.You need to install hard disk for Record and Playback.This 8channel 4-in-1 DVR which supports Analog, HD-TVI, CVI ,AHD Camera.It can compatible for 720P, 1080P Cameras. Build-in IR Cut Filter ensures true color under all lighting conditions day or night, night vision up to 20m to 40m Get set up quickly and easily,scan the QR code via mobile device using our free ZOSI View app (available on iOS/Android) ,Remote Viewing on iPhone, iPad, and Android devices Pre-Installed 1TB Hard Drive (expandable up to 4 TB) for 12 Days of Continuous Recording at Highest Resolution., Longer Recording Times Up to 30+ Days Available with Use of Motion Detection and/or Lower Resolution Settings. Two year quality Warranty, Life time Tech Support ! If your product stops working in the first year we will replace it.