... .MemoryDDR3:2GB,+Nand:8GB, 16GB option Model No.DescriptionSingle Core U19-1 (A10S) CPUAllwinner A10S,A8 1.0GHzOS+AdobeAndroid4.0.4 ... ,Air Mouse&keyboardUnitSize:115*115**23mm,Net Weight:162gDual Core U19-3 (RK3066)CPURockchip3066(Cortex-A9 Dual core),Mail-400(Quad ... &keyboardUnitSize:115*115**23mm,Net Weight:162gPrivate Model Quad Core U19-4 (A31) CPUAllwinner A31(Cortex-A7 Qual core)OS+AdobeAndroid4 ...