... Audio,4CH Playback VGA/TV,SATA HDD x2, Alarm,Remote control 4CH H.264 Standalone DVRFeatures: IC:Hi3515 Recording ... Support 2 SATA HDD 2TB, Also support S.M.A.R.T HDD technologySysterm upgrade:Support USB and ... picture preview, screen freezes, alone channel audio switches, client graphical playback interface Specification:ModelD7004-MBSystermCompressionH.264 MainProfileProcessor PlatformHi3515Operating ...