KINGSTON 16GB Micro Secure Digital High Capacity Class 4, Since 1987, Kingston has been known for the highest quality memory products available. The company recognizes the important role memory plays in computing productivity and takes the necessary steps to guarantee a reliable memory product. All Kingston memory modules must perform properly to ensure maximum performance. Therefore, Kingston has developed an industry leading quality process to ensure that Kingston memory delivers superior quality, performance, and 100% compatibility with the computing system the module is designed for.