... , RS485, IE browse,15 languages 4.HDD,alarm H.264 main profile compression algorithm ideal for standalone DVR4 channels ... function:live,recording,playback,backup & remote accessUser InterfaceGUI,on-screen menu tipsDisplay1/4VideoVideo StandardsPAL 625 line,50 f/s; ... search(accurate to second)Storage & BackupSpace OccupationAudio 28.8MB/H ;Video 25-450 MB/HRecord StorageLocal Hard disk and NetworkBackup ...