This is a Craftsman 41A5021 Garage Door Opener Logic Board Circuit Board 41A5021-2E. It is a circuit/logic board compatible with Craftsman, LiftMaster, and Chamberlain garage door openers. It is a non-domestic product with no manufacturer warranty. The model number is 41A5021-2E and it is designed for use with various compatible models as specified in the owner's manual.