Banner Optical Touch Buttons are touch-activated photoelectric switches designed to replace capacitive touch switches and mechanical push buttons. The Opto-Touch's SPDT electromechanical relay or solid-state output (depending upon model) is activated for as long as a finger, introduced into the touch area (yoke) of the switch, interrupts the Opto-Touch's infrared sensing beam. Banner Optical Touch Buttons are ergonomically designed to eliminate the hand, wrist, and arm stresses associated with mechanical push buttons. They require absolutely no physical pressure to operate. LED indicators light for power on and output activated.