Proportional Buttons + Trigger
When the Variable Voltage modules are supplied in a faceplate, they are activated using a Flexing Button. This is a special flexible dome shaped button that houses a small magnet. As the button is depressed the magnet is simply moved closer to the module which increases the output signal. The further the button is depressed, the higher the output signal from the module and because there is no contact or wear between the parts, the estimated life is more than 5 million cycles.

The Proportional Trigger works much the same as the flex buttons. There is a small magnet embedded in the proportional trigger lever. As the trigger is depressed it is simply moving the magnet closer to the Variable Voltage Module to increase the output signal.