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