Crucial 4GB Kit (2GBx2) DDR3/DDR3L 1333 MT/s (PC3-10600) SODIMM 204-Pin Memory For Mac - CT2K2G3S1339M
CT2K2G3S1339M is a 4GB kit consisting of (2) 2GB DDR3 Notebook modules that operates at speeds up to 1333 MT/s and has a CL9 latency. It is dual voltage and can operate at 1.35V or 1.5V. 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 DDR3 SODIMM memory.