TESTED and WORKING. The product is a Micron 8GB DDR4 SODIMM laptop memory module with a total capacity of 8GB. It is designed for high performance with a bus speed of PC4-21300 (DDR4-2666) and is compatible with laptops requiring a SO-DIMM form factor. The memory module is manufactured by Micron with a lifetime warranty and is a reliable choice for upgrading your laptop's memory capacity.