The Manual Safety Arms with LED Lights are similar to our Manual Safety Arms, but with the added feature of LED lights as an additional layer of protection. The garage door is opened high enough so the arms can clear, the arms are manually unlocked and swung into place under the garage door, and then they are locked into place to prevent moving. Once both arms are in place and make both limit switches, a green LED light will come on to let the operator know the safety arms are properly in place. When the safety arms are retracted in the “stow” position, a red LED light will be on. Please check out this measurement guide before selecting your product – measurement guide.