Specifications: Item Type: 17 Key Numeric Keypad Material: ABS Model: DX 17A Keys: 17 Keys Plug: USB Cable Length: Approx. 1.4m / 1.5yd Key Structure: Mechanical Linear Action Switch Life: >50 Million Times Product Size: Approx. 140 x 102 x 25mm / 5.5 x 4.0 x 1.0in Function: Splashproof, Mechanical Linear Action Switch, with Numlock Key, with +-*/ Keys, with Del Key Applicable: Business, Industrial Control, Sound Visual Education, Security, Road and Bridge, Securities and Other Different Scenarios Support: For DOS, for 95, for 98, for NT, for ME, for 2000, for 2003, for , for VISTA, for 7, for 8, for 10, for , for OS X, etc. Voltage Parameter How to Use Plug and Play Package List 1 x 17 Key Numeric Keypad