CPU ARM Dual core, CortexA9,1.5GHZ Screen Size 7'' Resolution 1024*600 Brightness 250nit Contrast 600:1 Active Area (mm) 0.240 X 0.240 Color 16.7M Viewing angle 160°(H) 160°(V) Response time 12ms RAM/ Internal storage DDR3 1GB/ 4GB WIFI Wi-Fi802.11/b/g/h Bluetooth Yes Interface 2xUSB2.0 ,1x10/100M self-adaption RJ45 interface , Touch screen High quality capacitive touch screen Serial ports 2xSerial ports OS Android4.2.2/ Andorid4.4.2 http://www.ksaiandroidpos.com