PRODUCT FEATURES:- 4/ CH TVI / AHD/CVI 1080P/1080P Lite/720P/WD1 video input 4 CH DVR supports 2 CH 1080P / 960P /720P IP video input Adopt standard H.265 high profile compression format to get high-quality video at much lower bit rate Intuitive and user-friendly Graphics User Interface ( GUI ), window style operation by mouse Multi-mode recording: manual / timed / motion / AI recording Playback : 4 CH simultaneously playback Search: time slice, time, event, tag search Express and flexible backup via USB, network and so on.