DVR 4CH video and 4CH Audio real time, D1 support DDNS, RJ 45, RS-485, remote control Alarm: ... Support 2 HDD DVR 4CH video and 4CH Audio real time Recording and displayRS-485 control support position settingRJ 45 port ... ,next file,previous file,repeat,shuffle,backup selection Search ModeTime/Date,Alarm,Motion Detection & exact search(accurate to second)Storage &Space ...