Model 371LM 1-Button Visor Garage Door Opener Remote Control One-button remote designed for Liftmaster garage door openers manufactured 2005 and later. Operates at 315 MHz frequency with Enhanced Radio Technology (ERT) and over 100 billion rolling codes for security. Programmable via the purple LED light on compatible openers. Features include visor clip or key ring mounting, ability to open/close the garage door and control opener lights, and a lithium battery with approximately 5 years of normal use life. Compatible with Liftmaster models 312HM, 355LM, 370LM, 372LM, 373LM, 374LM, 3800, 3110, 3220, and 3245. Note: Homeowners near military bases operating Land Mobile Radio (LMR) equipment at 390 MHz may experience interference. If interference occurs, consider the Liftmaster 355LM Conversion Kit, which operates on an alternate frequency.