Full Details on Amazon.com : http://www.amazon.com/gp/product/B007I8ADHC?tag=tsukuyomi-20
4GB Memory RAM for Dell Latitude E4200 E6510 E4300 Z XT2 204pin PC3-8500 1066MHz DDR3 SO-DIMM
Brand new certified 204pin PC3-8500 1066MHz DDR3 SO-DIMM Black Diamond Memory
Low density 4GB memory single stick memory module
100 compatible garrantee for Dell Latitude E4200
100 pre-tested on Dell system to ensure functionality
Lifetime warranty