ZOSI 720p HD-TVI Home Surveillance System,16 Channel Hybrid DVR Recorder and (8) 1280TVL 720p Indoor/Outdoor Bullet Security Camera with 100ft Night Vision, Motion Detection (No Hard Drive Included) (1). QR code scan via mobile device using our free ZOSI Smart app (available on iOS/Android).Live view and playback on your smartphone via 3G/4G/WIFI. (2). 16 Channel Hybrid Capability 4-in-1 DVR:With self-adaptive technology,it supports 4 kinds of camera models:Analog,720P/1080P AHD,720P/1080P TVI and CVI (3). 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 (4). Intelligent motion detection email alert with images; Motion detection recording allows you save more capacity hard drive(No hard drive included,20g/day/CH for 720P ,it can't record or playback without hard drive) (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!