Photo Electric Beams provide you with enhanced security of your garage and home. As soon as a person or object moves through the invisible photo electric beam the door or gate will stop and go into reverse. The installation of photo electric beams also enables the Auto Close option on your motor (where available). This Auto Close option means that after a pre-determined amount of time the opener will close your door automatically (as long as there is no interruption to the invisible electric beam). This erases any doubt if you forgot to press the button on your remote – you will know that your door will close leaving your home secure.