LOT OF 24 LiftMaster 811LM Remote Security+ 2.0 Encrypted DIP 811LMX. Encrypted DIP Security+2.0 (811LM) - Default. LiftMaster 811LMX features Security+ 2.0 Encrypted DIP, 315 MHZ DIP and 390 MHZ DIP technology and has 12 two position switches for programming.
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