... .264 realtime HD DVR recorder -USB,PTZ,Audio,Network,VGA -SATA HDD up to 2TB ... ; 3. Dual-core CPU; Steady System Function;4. Playback, video, network transmission, mobile browsing, and backup etc. work simultaneously;5 ... 2 USB2.0 PortsPTZPTZ Control Support Preset, Patrol, PatternAlarmVideoMotion detection, Video loss detection, Temper detectionIO input/output4CH Input, 2CH outputalarm linkageRecording ...