Liftmaster 371LM Garage Door Remote Control Transmitter.
Our basic single-button remote control isn't so basic. It can operate a single garage door or gate, or turn your garage door opener lights on/off. You can also use it as an extra remote control to turn on lights or small appliances inside your home – all from the comfort of your car. It features Security+® rolling code technology that sends a brand new code every time it is used. One 5-year 3-volt battery is included.