**********8channel 4-in-1 DVR which supports Analog, HD-TVI, CVI, AHD Camera. it provides you the flexibility to extend additional cameras. You can add 8pcs 720P or 1080P cameras. *****Longer Recording Times Up to 30+ Days Available with Use of Motion Detection*****Email Notification & Mobile Push Alerts when Motion Detection, Free Xmeye Apps for Live View and Playback on Smartphone Devices under Wi-Fi/ 2G/ 3G/ 4G Network*****Support USB port Back up, gives you the easiest option of backing up and transferring your video footage to a USB flash drive