... control .Vedio systemPAL,NTSCAudio compressionADPCMRecord modeManual,Time fixed,Alarm,Motion detectionRecord search modeDate/Time search,Event ... Playback resolutionPAL:640*272,NTSC:640*224Images show1 or 4 channels showRecord speedPAL:25fps(adjustable) , NTSC:30fps(adjustable ... )Video storageHard DiskLocal playback1 or 4 channel playbackPTZYesHard Disk portSATA port for max 500G ...