The product is a 128MB Third Party EDO DRAM SIMM designed for the Mac Performa 475 computer. It has a 72 pin design and a total capacity of 128MB, divided into a single module. The memory module is guaranteed by a lifetime warranty and operates at a bus speed of 60NS. Made in the United States, this memory upgrade is compatible with the Mac Performa 475 model, offering reliable performance and storage capacity for your computing needs.