The Chamberlain Group CRAFTSMAN CMXZDCG482 Garage Door Safety Sensors, Black

Safety Sensors automatically stop the garage door from closing if something (people, pets, or other objects) is in its path, giving you peace of mind. The color of the program button on the garage door opener is RED/ORANGE, PURPLE, and YELLOW with a yellow indicator light. The program button is located on the ceiling-mounted motor unit near the flexible wire antenna.