The 371LM 1-button visor remote control for garage door openers manufactured from 2005 and later. Operates at 315 MHz frequency with Enhanced Radio Technology (ERT) and over 100 billion rolling codes. Programmable using the purple LED light on compatible openers. Controls door open/close and opener lights. Includes visor clip and key ring attachment options. Compatible with 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.