Film switches are an all-in-one operating system integrating key functions, indicator elements, and instrument panels. They consist of four parts: the panel, upper circuit, insulating layer, and lower circuit. When the film switch is pressed, the upper circuit's contact deforms downward to make contact with the lower circuit's board, conducting the circuit. Upon releasing the finger, the upper circuit contact bounces back, breaking the circuit and triggering a signal. Film switches have a strict structure, attractive appearance, and good sealing properties. They feature a long service life and are widely used in electronic communication and measurement instruments, industrial control, automotive industry, smart toys, household appliances, and more.