... , RoHS H.264 4CH HDD Mobile CCTV with 3G and Panic button for Bus and Truck Features:H.264 Compresion, embedded Linux ... time remote view with internet explorer via networkGPS, 3G, RJ45,RS485/RS232, Alarm,Aviation connector,USB port and SD Card storage selectableSupport max ... 2TB HDD and 32G SD card8-48V DC input, ...