... USB 1.1StorageSD Card1 x microSD card slot, used like one IDE disk on PC, support SDHC ... 6-pin Header TTL signal level, can be used for GPRS/CDMA1X modems, GPS modules etcI2CI2C header ... Input5W max for spare board.MechanicalSizeStandard 3-inches industry computer,146mm(L) x102mm(W) x 25mm(H)SBC1250 ... 3.5 inch small form factor, can be easily used in space conservative environments.ü 400-700MHZ CPU, DDR2 ...