Liftmαster Receiver Logic board, guaranteed to work! 2005 to current AC Chain Drive operators. There are a lot of interchanges for this listing that have similar part numbers but the last letter will be different. This is simply a year designation and they are all identical boards. You may receive one of the following interchanges, but they are guaranteed to work on your unit if you have one of these numbers....

41AC050-2A

41AC050-2B

41AC050-2C

41AC050-2D

41AC050-2E

41AC050-2F

41AC050-2G

41AC050-2H

41AC050-2I

41AC050-2J

41AC050-2K

41AC050-2L

41AC050-2M