You are purchasing a Genuine OEM LiftMaster 891LM 1-Button Garage Door Opener Remote Control - Gray + Battery. Tested and works. Condition is Used. Please see ALL pictures before purchasing. 

Includes a working battery already installed.

To program the LiftMaster 891LM

1.  Press the Learn button to enter programming mode

2.  Press the Learn button again, the LED will flash once.

3.  Press and hold the button on the remote you want to use with your opener.

4.  Release the button when the opener's lights blink or two clicks are heard.

5.  Test the remote.

You can also search for how to program a LiftMaster 891LM 1 button Garage Door Opener Remote.  There are youtube videos also available.

Comes for a smoke free and pet free home.

Thank you for looking.

Have a blessed day!