The LiftMaster 422LM Two Channel Universal Coaxial Receiver is a 390 MHz add-on receiver designed to bring reliable remote control to gate operators, commercial door operators, and compatible garage door systems. Featuring two independent channels, it allows you to control two separate functions or operators from the same receiver, making it a flexible upgrade or replacement for mixed-use sites. Engineered for LiftMaster/Chamberlain Security+ 390 MHz rolling-code technology, it learns compatible transmitters such as the 971LM, 972LM, 973LM, and 974LM to deliver secure operation and strong resistance to interference and code grabbing. A coaxial antenna connection helps optimize range by allowing the antenna to be positioned away from metal cabinets or obstructions for cleaner reception in challenging environments.
Installation is straightforward: mount the receiver near the operator, connect the channel outputs to the appropriate control terminals, provide low-voltage accessory power from the operator, and program remotes via onboard Learn buttons. The two-channel design is ideal for assigning separate buttons to multiple doors, gates, or accessory functions in residential or commercial applications. For best performance, use only with 390 MHz Security+ devices and note that it is not compatible with 315 MHz systems or Security+ 2.0. Always integrate required entrapment protection and safety devices as specified by the operator manufacturer and applicable codes.
