... for mouse,backup,DVD-RW,movable hard disk,upgrade etc ...Alarm triggering screen tips,buzzer,PTZ preset,email,snapshot &FTP uploadSmart ... ,next file,previous file,repeat,shuffle,backup selectionSearch ModeTime/Date,Alarm,Motion Detection & exact search(accurate to second)Storage & BackupSpace OccupationAudio ... (highly)Weight2.38KG 4CH Full D1 Real Time H.264 CCTV DVR