Key benefits Secure, keyless access to your garage using a 4digit code — no remote or physical key required. Works with up to three garage door openers from one keypad (3 channels) for simpler household access. Improves convenience for family members, service providers, and deliveries while maintaining control with temporary PINs. What this keypad does Opens and closes compatible garage doors with a userprogrammed 4digit private code. Uses Security+ 2.0 rolling code technology to reduce radio interference and prevent code replay. Large backlit buttons for easy use at night and in low light. Includes a rain cover for outdoor protection and offers onetouch closing for easy exit. Compatibility Compatible with LiftMaster, Chamberlain, and Sears Craftsman garage door openers that have purple, yellow, red, orange or green learn buttons and were made from 1993 to present. Does not work with Craftsman 200.57933 57943 57953 Series 100 CR1150 139.57943 139.57953. Replacement for: 877MAX, 878MAX, G940EVP2, 377LM, 977LM, 877LM, 66LM, CMXZDCG440. Installation and performance Wireless installation and wireless programming — no wiring required. Designed to synchronize with existing opener frequencies and has been rigorously tested with specialized equipment. Controls up to three motor units from the same keypad. Temporary PIN and practical uses Create temporary PINs to grant shortterm access without revealing your main code — ideal for: 1) House sitters or maintenance personnel who need temporary access while you're away. 2) Contractors, meter readers, or delivery personnel who require limited entry for a scheduled job. 3) Family members or neighbors who need regular access without sharing your permanent code. Customer support and guarantee If you're unsure about fit or need help, use the 'Ask a Question' button on our store page or send us an email. If you are not satisfied with your , contact us and we will resolve the issue. We can , , or send a brand unit if needed. No questions asked.