The 877LM wireless keypad uses a yellow learn button to program the keypad's code. The 877LM will open or close your garage door without using a remote control or key. The 877LM wireless keypad can open the door using a private 4-digit code you program directly into the unit. You can also program it with temporary access codes for visitors or delivery and service personnel so they can gain access to your garage without having to give them your personal code. This 877LM keypad includes mounting screws, battery and programming instructions.