This Mushkin Enhanced DDR3 SDRAM memory kit is perfect for upgrading your computer's capacity. With two 4GB modules, it offers a total capacity of 8GB. The Mushkin Essentials model has a bus speed of PC3-8500 (DDR3-1066) and a low voltage of 1.5V. Each module has 240 pins and is in SO-DIMM form factor. The memory kit is brand new and still in its original packaging, never opened. It is a great addition to any computer system and will provide faster and smoother performance. Don't miss out on this great deal for high-quality memory!