A touch key switch (also known as a touch switch) is a switch that can be activated without the application of force. They usually consist of a number of capacitor boards and circuits, and are a very convenient form of switching. This switch is a common one in modern electronic devices, and it is widely used in many smart phones, tablets, computers and other devices. Compared with traditional mechanical switches, it has the advantage that it does not need to be pressed hard, so it is easier and more natural to use. In addition, it also has the advantages of waterproof and dust-proof, because there is no physical button, so there is no possibility of dust or water entering the switch and causing the switch to fail. In short, the touch key switch is an efficient, convenient, comfortable and safe switch form, which is an indispensable part of modern electronic equipment.