This link is only the shaft and switches for mechanical keyboard,no keyboard and switch tester included. Built with quality elastic material and double gold contact structure, the duration is up to 100 million strokes, which is twice that of ordinary mechanical switches The upper cover and the base are hollowed out, leaving rooms for SMD lamps and the DIP lamps Moderate tactile, suitable for gaming and typing Before buying, Please make sure that what is your Keyboard Switches，This item is supplied to professionals！ colour :pink QUANTITY: 5PCS Or 10 PCS Switch type: Tactile, soundless Cover: Semi transparent Contact poles: unipolar contact Contact material: rose gold alloy Operating force: 45 ± 10 gf Pre-travel: 2.0 ± 0.3mm Total travel: 4.0-0.3mm Duration: 100 million key strokes Switching voltage: 2~12V DC Switching current: 10μA~10mA DC Contact resistance: 500mΩ Max Insulation resistance: 100MΩ Min Operating temperature range: -25 ℃ to + 70 ℃ ( -13°F~158°F ) Lamp hole type: SMD, DIP customizable Tactile feel, no "click" sound No noise / spring sound during operation Less shaking of the switch due to the cover and the base firm fastening; Built with quality elastic material and double rose gold contact structure, Built on fully automatic assembly and testing integrated lines, good product consistency