Components
C&K Components is a European, family-run company that designs and manufactures switches, rotary and pushbutton encoders, snap domes, lighting components, and special function electromechanical products. The 21504 part they offer is a USB product called an ETSI-QWERTY Pushbutton Keypad. It has a standard QWERTY layout and is suitable for applications that require user input via a keypad, such as point-of-sale kiosks, gaming systems, data entry machines and many more. The pushbuttons are illuminated, giving it a unique look in dark environments and providing a clear visual reference. The keypad is also pressure sensitive, which allows for faster data entry and improved accuracy. Additionally, the switches have a reliable life expectancy of over 1 million operations.