#1	For garage door openers that currently have sensors installed
#2	41A4373A sensors are compatible with LiftMaster and chamberlain brand from 1993 late 1990s
#3	Each sensor has a green light and a bolt that runs right through the center of each sensor
#4	Designed to splice into your existing wires
#5	Includes 1sending unit 1receiving unit wire connectors and instructions no brackets