Micron 4GB PC4-19200 DDR4-2400MHz non-ECC Unbuffered CL17 260-Pin SoDimm 1.2V Single Rank Memory Module (MTA4ATF51264HZ-2G3B2). This is a seller refurbished part in great working condition. May show signs of cosmetic wear but this should not interfere with the effectiveness of the product. Taken from a working environment.