Passive wireless switch is a new type of switch which is different from the traditional power switch. The switch does not require a battery or a power cord. There are mainly two kinds of kinetic energy switch, one is the mechanical energy generated by gently pressing the button of the switch with your finger, which can be automatically converted into electrical energy, so as to control lamps, air conditioners, televisions and other electrical equipment; the other is passive wireless power generation by photovoltaic power generation that absorbs light energy.