Features H.264 Video Compression format. Multi-mode input digital zoom. Combine the function of DVR/HVR/NVR. Support pre-alarm recordingbefore 30 sec. Support 1920 1080P HD and 1024 768 VGA output. 4-ch video and 2-ch Audio input 4-ch playback. Multi-stream recording resolution and Multiple backup modes. Scheduled recording motion detection. With P2P cloud function.