The product is a set of four 1GB DDR3 RAM sticks, with three from Samsung and one from Kingston. Each stick has a total capacity of 1GB, providing a total of 4GB of memory when all four sticks are installed. This upgrade can help improve the overall performance and multitasking capabilities of a computer, especially for tasks that require a lot of memory usage. The reliable Samsung brand ensures quality and compatibility with a wide range of devices.