taxi display system can rotate advertisement 3G,wifi,ethernet sunlight readable touch screen ... Inch (800*480 Pixel)90 Degrees’ switchable screenBack-light with high contrast, High-sensitivity resistive touch screenCPUVia WM8650 800MhzRAM(Memory ... headrestStorageTF cardTF cardHard diskOptionsBattery,Wifi Battery, WIFI,Battery, WIFI, Taxi Display Computer System With Touch Screen, 3G, WiFi