This Is A Standard Num-Pad. It Can Be Used Whether For Numerical Inputs Controls Or For Frequent Number Entry. Key Features: Ideal Accessory For Notebooks All Keys Can Be User-Defined With Up To 24 Characters Per Key. Durable, Fastest Key Response Specifications: Keys: 24 Programmable Keys: Yes OS Support: All Including Windows And Macintosh Package Includes: 1x Num-Pad