1999 - 2005 Chamberlain and Liftmaster Belt Drive Operators The board you receive could have a different letter at the end than the one pictured, but that's just the year designation and doesn't change the function of the board. Interchanges include.... - 41A5021-D - 41A5021-5A - 41A5021-5B - 41A5021-5C - 41A5021-5D - 41A5021-5E - 41A5021-5F - 41A5021-5G - 41A5021-5H - 41A5021-5I - 41A5021-5M The part you receive WILL NOT be the exact one pictured, however it will be the same part number Elevate the functionality of your garage door opener with the LiftMaster Chamberlain Circuit Board End Panel. Featuring a red learn button for easy programming, this essential component is compatible with a wide range of models, including Chamberlain, Craftsman, and LiftMaster, ensuring seamless integration with your existing system. With part number 41A5021-5 and an operating frequency of 390MHz, you can trust in its compatibility and reliability. Designed to meet the needs of both homeowners and professionals, this circuit/logic board is a straightforward replacement or upgrade to maintain the smooth operation of your garage door. It does not come as a custom bundle or a modified item, assuring you of its originality and intent, making it a straightforward addition to your garage door opener setup.