... ,memory:T flash support Max. 32GB 3,3G,GPS bult-in 4,NAND:4GB 5,CPU:RK2818 ... 600MHz+600DSP2,band:only for 3G version3,Communication Frequency band(only for 3G version):WCDMA: 850/900/1900 ... /2100 MHz4, 4GB NAND+ 256MB DDR25,3G and GPS bult-in6,memory card:T flash support ... contact us. SeriesmodeldescriptionGPS-MID seriesR503G(new style without 3G)ultra-thin 5-inch resistive touch screen LCDR703G( ...