Kingston offers extremely reliable, high-performance desktop memory and sells more notebook upgrade memory than anyone in the world. Each and every module is customized and tested to meet the exact specification requirements of each system. Kingston memory can increase the processing power of your notebook or desktop. It's guaranteed compatible and offers a great cost-performance benefit plus better multitasking, faster processing of multimedia files, smoother video streaming and an enhanced gaming experience. For added peace of mind, Kingston memory is backed by a lifetime warranty, free technical support and legendary Kingston reliability.Included in the package is one 4GB module of select HP / Compaq Laptop Memory. Specs are 204-pin unbuffered SODIMM.