The 877MAX wireless keypad provides secure, convenient control for LiftMaster garage door openers manufactured since 1993. This model replaces the 878MAX, 376LM, 377LM, 877LM, and 977LM keypads. Features include a 4-digit security code, temporary PIN access for visitors and service providers, and a backlit keypad for low-light operation. The wireless design requires no drilling or wall penetration. Enhanced signal strength ensures reliable performance across all compatible openers and 315MHz LiftMaster and Elite gate operators. Installation is straightforward with included mounting screws and instructions. The package contains the keypad remote and clear setup guidance. Dimensions: 6 1/4" long, 2 1/2" wide.