H. 264 video compression 8CH 1080N HD-TVI DVR with 1TB hard drive. Includes 4Pcs 720P 1280TVL indoor outdoor waterproof security cameras with 1280 TV lines. Email notification and mobile push alerts when motion detection, free Zosi view apps for live view and playback on smartphone. Support USB port back up, gives you the easiest option of backing up and transferring your video footage to a USB flash drive. Two Year quality warranty, life time Tech support ! if your product stops working in the first Year we will replace it.