16gb kit consisting of 2 8gb ddr3l 135v notebook module that operates at speeds up to 1866 mts and has a cl13 latency it is dual voltage and can operate at 135v and 15v it is unbuffered and is non ecc it conforms to the industry standard sodimm layout of 204 pins and is compatible with computers that take ddr3l sodimm memory specifically geared towards mac systems specifications general capacity 16 gb2 x 8 gb upgrade type system specific memory type dram technology