Chamberlain 935CB Motion Sensor

Door Control Push Bar: Press to open or close the door. Press again to reverse the door during the closing cycle, or to stop the door while it is opening. Light Feature: Press the Light button to turn the opener light on or off. When the door is opened or closed, the light will remain on for 4-1/2 minutes. Press the Light button to turn it off sooner. The Light button will not control the opener light when the door is in motion. When using the opener lights as working lights, we recommend that you first disable the motion sensor.