This is a “wobbling spring” type vibration sensor. It has two pins, one normal sized and one very very thin. Inside the thin one is connected to a spring which surrounds the main pin, when vibration happens the spring wobbles and touches the main pin closing the circuit momentarily between the two.
This is a very common type of vibration sensor used with microcontrollers such as Arduino, PIC and ESP32.
By it’s nature a vibration sensor isn’t really a “switch” because it’s in a permanent state of “bounciness”, but you can use such a sensor to detect vibration and then your microcontroller closes a relay or a transistor or whatever to do the thing you want it to do, light an led, sound an alarm, fire the death ray, that sort of thing.
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