ZOSI 8-Channel 720p HD-TVI Security Camera System,1080P Lite Video DVR Recorder (1TB HDD Built-in) and (4) 1.0MP(1280TVL) Day Night Indoor/Outdoor Weahterproof Dome Surveillance Cameras (1). QR code scan via mobile device using our free ZOSI View app (available on iOS/Android).Live view and playback on your smartphone. (2). 720P AHD-TVI Video - Get a sharp and crisp image day or night with the Weatherproof camera's automatic IR-cut filter. Up to 65ft night vision. (3). Intelligent motion detection email alert with images; Motion detection recording allows you save more capacity hard drive(1TB hard drive Built-in,20g/day/CH for 720P) (4). Ultra long continuous recording & easy USB backup:The DVR can be set to automatically overwrite the oldest stored footage,and you can backup the records via the USB backup (5). All systems CE & FCC certified with qualified power supplies.Guaranteed for 2 Year & Free life time Tech Support.//// Please refer to the last product images on the left side ,it will show you how to contact us for help ! Definitely respond within 24 hours!