... RoHS H.264 4CH HDD Mobile CCTV with 3G and Panic button for Bus and Truck Features:H.264 Compresion, embedded Linux ... via networkGPS, 3G, RJ45,RS485/RS232, Alarm,Aviation connector,USB port and SD Card storage selectableSupport max 2TB HDD and ... in4 Channels Independent Input. High Voltage TriggerInterfaceUSB PortAvailable For USB Disk and Hdd(FAT32)StorageGPS,3GVehicle Tracking and Data Wireless ...