Features Excellent ABS Material: This garage door opener remote keypad is made of using excellent ABS material, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life. Good Compatibility: This craftsman garage door opener has good compatibility and is compatible with for Liftmaster, for Chamberlain and for Sears Craftsman garage door remotes, which is very useful. Easy To Use: This garage door opener keypad is a secure keyless entry system that opens and closes your garage door without the use of a remote or key. The wireless keyless entry system opens the garage door using a dedicated 4 digit code that you program directly into the device. Easy To Install: This wireless keyless entry keypad offers wireless installation and wireless programming with large backlit buttons on the keypad providing quick and easy access. Offers a 1 touch close feature that makes closing your garage door easier than ever. Rolling Code Technology: This wireless keyless keypad uses rolling code technology to easily synchronize with existing door opener frequencies and eliminate radio ripple interference. The keypad has 3 channels for 3 openers, so you can control up to 3 motor units with just 1 keypad. Specification: Item Type: Garage Door Opener Keypad Material: ABS Replace: for 877MAX G940EV-P2 878MAX 377LM 977LM 877LM 66LM Battery: 1 x 6F22 400mAh Alkaline Battery (Included) Transmission Distance: Approx. 100m / 328.08ft (Open Field) How to Use: Take out the garage door opener keypad and install it, then it can be used. Package List: 1 x Garage Door Opener Keypad 2 x Screws 2 x Expansion Screws 1 x Manual Package List 1 x Garage Door Opener Keypad 2 x Screws 2 x Expansion Screws 1 x Manual