Gikfun SW-18015P Electronic Vibration Sensor Switch for Arduino Raspberry pi (Pack of 20pcs) AE1079 1.The switch is spring-loaded, non-directional vibration sensor trigger switch can be triggered at any angle 2.When the switch is in the OFF state is open at rest, when subjected to external vibration touch to achieve the appropriate force, or moving away from the speed of the appropriate (partial) effort, conductive pin will produce an instant turn-on was an instant ON state; disappear when the external force , switch back to the open-OFF state