... DVR 1,H.264 CIF Linux system 2,GPS,3G,WIFI,HDD&SD,Intercom,G-sensor 3,8~48V power ... input 4,Multi-language Optional functions: GPS, 3G, G-sensor, Motion detection, RS485/RS232 ItemsItem Name4 Channel Mobile ... Voltage TriggerInterfaceUSB PortAvailable For USB Disk and SD Card StorageGPS,3GVehicle Tracking and Data Wireless UploadOthersPower ConsumptionDC8-48v 5% 8WWorking Temperature - ...