Module Size: 4GB
Package: 240-pin DIMM
Feature: DDR3 PC3-12800
Specs: DDR3 PC3-12800 , CL=11 , Unbuffered , NON-ECC , DDR3-1600 , 1.5V , 512Meg x 65
Lifetime warranty. Compatible to desktop PC's only. Please, make sure, your desktop supports 4GB ram per slot.