The Ultra Light switch is a very small (smaller than your thumb) switch that requires very little pressure and gives tactile and audible feedback. It is easily mountable within reach of a finger, and its small size and low price let you mount several switches within easy reach of one or more fingers. Each switch comes with 5 interchangeable color panels. This particular variant is setup to mount directly onto the thumb, so that simply flexing the thumb activates the switch. ** Replacement Cost $50.00