LiftMaster 850LM 3-Channel Door & Garage Opener Receiver

Works with 811LM, 813LM, and all MAX remote controls. Supports expansion to three channels and stores the following remote counts: Channel 1 - 50 remotes, Channel 2 - 20 remotes, Channel 3 - 20 remotes. The compact housing is designed to fit most gate and commercial door operators. Enables a single transmitter solution to provide convenient access to gated communities, industrial facilities, and commercial sites. Multiple remote control options are available so users can gain secure entry from the safety and convenience of a vehicle.