It is the first generation of Samsung NAND chip, 8-bit, 4-chip selection,16GB chip. The operating voltage is 2.7-3.6V... K9 is Samsung's chip,M represents MLC DSP,DG is 16GB of storage media,08 is 8-bit,U is 2.7-3.6 voltage,5 is 4 pieces of choice plus 4,M is the first generation chip, it is fine enough.