Liftmaster garage door opener
3 transmitter upgrade kit

LiftMaster Garage Door Opener Universal Upgrade Kit Model 335LM-3T

• Garage door opener receiver and 3 transmitter set upgrade or replacement kit, this kit will upgrade your old format Sears, Liftmaster, Chamberlain, Craftsman to the newest Security+ technology
• Compatible with 2 or 3 wire wall control systems, can also use an external 24/110 volt transfomer
• Security+ technology, the code between the remote and receiver changes with each use for extra security. Stops code grabbers COLD!
• Over 100 billion possible codes makes it impossible to duplicate the frequency
• Accepts multiple remote controls utilizing up to 8 functions, and one Security+ keyless entry
• Will work with Lift-Master, Sears, Craftsman or Chamberlain remotes with the yellow LED light (Security+ format)