The 635LM receiver uses Security+ technology to upgrade or replacement your receiver. The code between the remote and receiver changes with each use for extra security. It is designed for use with 2 or 3-wire systems using the built in transformer. It accepts multiple remote controls utilizing up to 8 remotes and one wireless keyless entry. Compatible remotes are 91LM, 973LM and keypd 977AC. Programming Instructions Are Included With Your Order
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