Kingston is the industry leader in PC memory. Kingston is your best source for system-specific memory. Product is backed by a lifetime warranty and free technical support. Included in the package is one 4GB module of select Intel Laptop Memory. Specs are 204-pin unbuffered Non-ECC Low Voltage SODIMM. Standard 512M X 64 Non-ECC 1600MHz 204-pin Unbuffered SODIMM (DDR3L, 1.35V, CL11, FBGA, Gold)