The LiftMaster 365LM 371LM 878MAX Security+ 315MHz Plug‑in Receiver Two Remote Keypad Kit adds modern, secure wireless control to compatible garage door openers, gate operators, and commercial overhead doors. The 365LM plug‑in receiver creates a dedicated 315 MHz Security+ rolling‑code radio channel that connects to an operator’s wall‑control terminals, enabling reliable remote and keyless operation. The kit includes two 371LM single‑button Security+ 315 MHz transmitters for everyday use and an 878MAX universal wireless keyless entry for PIN‑based access. It is ideal as a replacement or upgrade kit for systems without built‑in radio or for cross‑brand applications where the receiver’s dry‑contact output can interface with most operators.
Engineered for LiftMaster/Chamberlain/Craftsman systems that use Security+ technology, the 365LM operates at 315 MHz and plugs into a standard 120V AC outlet, with a single‑channel relay output wired to the opener’s push‑button terminals. Programming is straightforward: press the receiver’s Learn button, then activate the 371LM remotes or enroll the 878MAX keypad; the Security+ rolling code enhances security with a new code on every activation. The 878MAX supports multi‑brand compatibility (Security+ 2.0, Security+, and Billion Code) and can be set to Security+ 315 MHz when pairing to the included receiver; it features a backlit, weather‑resistant keypad for exterior mounting and user PIN management. Install the receiver within lead length of the control terminals and position the antenna for best reception; mount the keypad out of reach of moving hardware and follow all operator and UL 325 safety instructions, ensuring functional photoelectric sensors where required.