... DDNS RS 485 Control mobile phone view Support 1 SATA port HDD MAX 2000GB 4CH security DVR, 4-CH DVR, cctv ... 1CH Audio real time Recording and display4CH D1Video I/O: 4/1Playback: 4RS485: supportAudio I/O: 1/1 4/1Alarm: N/AHDD: 1*2T ... DetectionZones:396(22*18)detection zones,Sensitivity:1-6(6 is highest)Trigger recording, PTZ movement, tour, alarm, email, snapshot & FTPAudioAudio ...