One-button-to-close feature (works with all LiftMaster garage door openers manufactured since 2006) Temporary password option Compatible with all LiftMaster garage door openers manufactured since January 1993 Backlit keypad Security plus Wireless design Keyless Access New and improved replaces 877max OEM 878 max only Liftmaster 878 max get access into your garage by installing a wireless keypad on the outside of your garage door. With the 878 max you can open the garage door with a 4 digit pin number that you chose to progaram. The 878 max replaces previous models for 390mhz and 315 mhz.