Designed to help your system run faster and smoother, Crucial Laptop Memory is one of the easiest and most affordable ways to improve your system?s performance. Load programs faster. Increase responsiveness. Run data-intensive applications with ease, and increase your laptop?s multitasking capabilities. Specifications: - 1600MHz DDR3 SDRAM - CAS Latency: CL11 - UDIMM 204 pin Form Factor - Voltage: 1.35V/1.5V What's in the box Crucial 4GB 1600MHz DDR3 SO-DIMM Laptop Memory