The Chamberlain Liftmaster Circuit Board End Panel features a green Learn Button and is model number 41A5021-9G-315. It is a Receiver Logic Board designed for LiftMaster and Chamberlain garage door openers. This circuit board is compatible with the Liftmaster ATS2113X model. It is a single package quantity item and is not for use with non-LiftMaster or non-Chamberlain brands.