The 374LM is a 4-button visor remote designed for Liftmaster garage door openers manufactured from 2005 and later, operating at 315 MHz with Enhanced Radio Technology (ERT) and over 100 billion rolling codes. It controls up to four separate garage door openers and can toggle opener lights on/off, with a visor clip or key ring for convenient mounting. Programming is performed using the purple LED light on compatible Liftmaster openers. The package includes a visor clip and key ring attachment.