... security DVR 1CH audio dvr real time system DDNS RS 485 Control mobile phone view Support 1 SATA port HDD MAX 2000GB 4CH security ... :396(22*18)detection zones,Sensitivity:1-6(6 is highest)Trigger recording, PTZ movement, tour, alarm, email, snapshot & FTPAudioAudio ... 90%Atmosphere Pressure86kpa-106kpaDimensionL233*W300*H45 MMWeight1.2KG netwrok real time H.264 4CH security DVR, 4-ch network cctv dvr