These handy switches are specially designed for individuals who are unable to control or sustain the hand or wrist movements necessary to operate traditional plate switches. The Mini-Saucer and Saucer Switch is activated with just a light touch. The Adjustable Pressure Saucer Switch allows the user to adjust the pressure from approximately ½ to 32 ounces and has a small LED lamp that glows when the switch is activated. Saucer switch size: 7″D x 1″H. Weight ¼ lb. Mini-Saucer size: Size: 3¼”D x 1″H . Weight: ¼ lb. Pressure switch requires 1 9-V Battery. Weight: ½ lb.