The SDC 474 Touchless Switches use Active IR Sensor Technology. A simple wave of the hand in front of the 474 Touchless Switch activates the switch to control electric locks/strikes, magnetic locks, or automatic door operators for entry or egress. 474 Touchless Switches come standard with an adjustable 2"-7" activation read range. The Dual LED, illuminated sensor, clearly indicates status. The Red LED indicates inactive status, which changes to a temporary Green LED state to indicate activation. Ideal for but not limited to facilities that require contamination control. The 474 Touchless Switches help reduce the spread of infection and diseases in any application.