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850LM Liftmaster Receiver. Controls up to 3 gate operators or commercial door operators, Supports up to 90 remote controls (811LM, 813LM or 893MAX remotes) and 2 keypads (877MAX), Narrow-band on 310 MHz, 315 MHz, and 390 MHz Security+ 2.0™ Rolling Code and Encrypted DIP, Security+ 2.0 radio for interference free communication, Compatible with Mechanical and Logic based operators.
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