LiftMaster 877max, Light Gray Description Open or close your garage door without using a remote control or key. The LiftMaster wireless keyless entry system can open the door using a private 4-digit code you program directly into the unit. You can also program it with temporary access codes for visitors or delivery and service personnel so they can gain access to your garage without having to give them your personal code. Plus, it works with all LiftMaster garage door openers manufactured since January 1993. Features: Security+2.0 and security+ rolling code technology assures a new code is sent every time Weatherproof flip-up protective cover Backlit keypad makes numbers easy to see, even in the dark Compatible with all LiftMaster garage door openers manufactured since January 1993 Product Details: Manufacturer: ‎Chamberlain Part Number: ‎877max Item Weight: ‎2.08 ounces Product Dimensions: ‎8 x 3 x 0.05 inches Item model number: ‎877max Batteries: ‎1 A batteries required. Is Discontinued By Manufacturer: ‎No Color: ‎Light Gray Material: ‎Plastic Item Package Quantity: ‎1 Number Of Pieces: ‎1 Included Components: ‎Liftmaster 877max Batteries Included?: ‎No Batteries Required?: ‎No Battery Cell Type: ‎Alkaline Date First Available: May 20, 2011