Garage Door Keypad: The 877MAX Garage Door Keypad fits all Liftmaster garage door openers manufactured since 1993 and replaces the 878MAX 376LM 377LM 877LM 977LM Keypad. Simple to install, it helps you easily open or close your garage door without a remote or key. Upgraded technology provides stronger signal and function usage..Easy to Use: Simple to install and help you open or close your garage door easily without a remote or key. Upgraded technology provides stronger signal and function usage. At the same time, high-quality materials are durable and will not fail for a long time, and can be used for at least 5 years; the backlight design can ensure normal reading even at night..Completely Wireless Design: Powered by battery (included). You can easily open or close your garage door without using a remote or key. The installation is simple, eliminating the trouble of punching holes and passing through walls. Easy to use after programming..Package Include: This product includes keyboard, mounting screws, 9V battery, installation instructions. No professional required, you can install it easily. Remember: for the program to succeed, follow the steps quickly to prevent timeouts. You can contact us at the first time for any use problem, please use it with confidence..100% Service: We promise the premium quality and the best service. If you are not completely satisfied with your purchase, simply let us know and we will provide you with a FULL refund or replacement, no questions asked.