The key switch with lamp is an electronic switch, belonging to the category of electronic components, which applies pressure to the direction of switch operation in order to satisfy the operating force, and the switch function can be closed and switched on. When the pressure is removed, the switch opens and the internal structure is switched on by the force variation of the metal projectile. The most common key switches are available in a wide range of sizes, appearance styles, functions, lights, etc., as well as pedal switches and emergency switches for heavy use in high grams. More suitable range for waterproof type or SMT process.