This listing is for a repair kit for Chamberlain control board 41A5021-D, 41A5021L, and 41A5021-1D. The kit is compatible with LiftMaster brand and is specifically designed for circuit/logic boards. The model numbers for the compatible boards are included in the aspects section. This repair kit is perfect for those looking to fix their garage door opener without having to replace the entire unit. It is ideal for Home & Garden, Home Improvement, Building & Hardware, and Garage Doors & Openers categories.