1、Mechanical Linear Action Switch: The key switch structure is mechanical, and the Mechanical Linear Action Switch structure has an excellent feel so it operates quietly compared to other mechanical keys. 2、20 Key: 20 key mechanical numeric keyboard, plug and play, USB interface, no driver required, multi system compatibility. 3、Function: Splashproof, mechanical Linear Action Switch, with Esc key, with F1 to F6 key, with Enter key, with clear key, four large nonslip feet at the bottom. 4、Long Service Life: laser engraved characters, not easy to be erased, long key life, comcompatible withtable key hat, key life more than 50 million times. 5、Scope of Application: Number pad is suitable compatible with different scenarios such as business, industrial control, audio visual education, security, road and bridge, and securities. Suitable compatible with laptop users, suitable compatible with banks, financial security, business people. 1 x 20 Key Numeric Keypad Item Type: 20 Key Numeric KeypadMaterial: ABSModel: DX 20AKeys: 20 KeysPlug: USBCable Length: Approx. 1.4m / 1.5ydType:Linear Action Switch Mechanical Numeric KeypadKey Structure: Mechanical Linear Action SwitchButton life: >50 million timesVoltage: DC 5VCurrent: ≤60mAProduct Size: Approx. 140 x 102 x 25mm / 5.5 x 4.0 x 1.0inFunction: Splashproof, Mechanical Linear Action Switch, with Esc key, with F1 to F6 key, with Enter Key, with Clear KeyApplicable: Business, Industrial Control, Audio Visual Education, Security, Road and Bridge, Securities and Other Different ScenariosSupport: compatible with DOS, compatible with Windows 95, compatible with Windows 98, compatible with NT, compatible with ME, compatible with 2000, compatible with 2003, compatible with XP, compatible with VISTA, compatible with Windows 7, compatible with Windows 8, compatible with Windows 10, compatible with Linux, compatible with OS X, etc.