taxi display system can rotate advertisement 3G,wifi,ethernet sunlight readable touch screen 90 degrees switchable ce, rohs 7 Inch ... screenBack-light with high contrast, High-sensitivity resistive touch screenCPUVia WM8650 800MhzRAM(Memory)DDRIII 256MBStorage Device(Flash)4 ... cardHard diskOptionsBattery,Wifi Battery, WIFI,Battery, WIFI, Taxi Display Computer System With Touch Screen, 3G, WiFi