18 Key Numeric Keypad Mechanical Linear Switche Linear Switche Splashproof USB Numeric Keypad with Anti Skid Pads for Laptop Desktop PC Item Type: 18 Key Numeric Keypad Material: Plastic Model: DX 18A Keys: 18 Key Cable Length: Approx. 1.4m / 1.5yd Key Structure: Mechanical linear switche linear switche Button Life: >50 Million Times Product Size: Approx. 140 x 102 x 25mm / 5.5 x 4.0 x 1.0in Function: Splashproof, Mechanical linear switche linear switche, With Delete Key, with Esc Key, with F1 F2 F3 F4 Key, with Enter Key Applicable: Business, Industrial Control, Sound Visual Education, Security, Road and Bridge, Securities and Other Different Scenarios Support: For DOS, for Windows 95, for Windows 98, for NT, for ME, for 2000, for 2003, for XP, for VISTA, for Windows 7, for Windows 8, for Windows 10, for Linux, for OS X, etc.