This is a replacement circuit board for SECURITY + screw drive models made between 1997 and present
Please call 866-901-1600 to check on compatibility with models from Wayne Dalton, Sears, Master Mechanic, Liftmaster, Chamberlain, Craftsman
IMPORTANT: PROTECT YOUR INVESTMENT - Liftmaster/Chamberlain 990LM can protect your garage door opener components, such as circuit board, safety sensors and wall console from power surges that happen during lightning storms.
