- Wide compatibility - This wireless garage door keypad is compatible with Liftmaster, Chamberlain, Wayne Dalton, & Sears Craftsman garage door openers with purple yellow, red, orange & green learn buttons - all 315 or 390 MHz models made after 1993 - Replacement 877MAX G940EV-P2 878MAX 377LM 977LM 877LM 66LM CMXZDCG440 - Easy to install & use - Wireless installation & wireless programming - Rain cover - Large red backlit buttons on the keypad provide quick & easy access - One-touch closing feature that makes closing the garage door easier than ever Secure & reliable - Latest rolling code technology that easily synchronizes with existing door opener frequencies to eliminate radio wave interference - 3 channels for 3 door openers, so you can control up to 3 motor units with just one keypad - Temporary Password: Can be provided to maintenance personnel, meter readers, house sitters, etc. while you are away without revealing your family's private entrance code - 2 remotes Exceptions: Does not work with Craftsman 200.57933 57943 57953 Series 100 CR1150 139.57943 139.57953, Models whose connection protocol is Wi-Fi are not currently supported! Brand new, in box Offers and bundles welcome:o)