... 2.0 port for mouse,backup,DVD-RW,movable hard disk,upgrade etc ...Alarm triggering screen tips,buzzer,PTZ preset ... 28.8MB/H ;Video 25-450 MB/HRecord StorageLocal Hard disk and NetworkBackup ModeNetwork download/Flash stick/movable HDD/SATA ... 2048G)EnvironmentalPower Supply12V/3.3APower Consumption<10W(not include Hard disk)Working Temperature0°C-+55°CWorking Humidity10%-90%Atmosphere Pressure86kpa- ...