Controller, Door Access Security, iSTAR Ultra GCM Board, 16Gb Flash Memory, 2Gb DRAM, 1.0GHz Dual Core, 32 Readers Max, SD Card Expansion, 2x ACMs, 24x Input/ACM, 16x Output/ACM, 8x Wiegand/ACM, 16x I8/ACM, 16x R8/ACM