This is a New GD-R21 Compatible Replacement Wireless Keypad
The wireless keypad GD-R21 is a device that lets you operate your garage door without a remote control or a key. You can program the keypad with a personal 4-digit code to open or close the door. The keypad is compatible with openers that have Purple learn buttons for setting the code.
This order includes a keypad, a battery, mounting screws, and a manual.