The 373AC is a 3-button visor remote designed for Liftmaster garage door openers manufactured in 2005 and later. It operates at 315 MHz frequency with Enhanced Radio Technology (ERT) and features over 100 billion rolling codes for security. The remote controls up to three separate garage door openers and can toggle opener lights on and off. It is programmable using the purple LED light on compatible Liftmaster openers. The package includes a visor clip and key ring attachment option. Note: Homeowners located near military bases may experience interference from Land Mobile Radio (LMR) equipment operating at 390 MHz, which shares the same frequency band as Chamberlain, Liftmaster, Sears Craftsman, and Genie openers. If interference occurs, Liftmaster offers the 355LM Conversion Kit, which operates on an alternate frequency to resolve compatibility issues.