Firefly 310 Linear DTC and ladybug compatible keychain remote better range & you pay less!
Transmitter Solutions Firefly 310LID21KX2 Linear Mini-T Delta 3 DT-Set of 2
Linear DNT00026 Delta-3 Miniature 1-Channel Key Ring Transmitter, Black/White
LINEAR DT Linear Delta Remote DNT00002A DTC DTA Transmitter Gate Garage Door Opener,Black
Linear DTC - 310MHz Remote 1 Button
Linear DR3A - Garage or Gate Receiver
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Linear 308911x5 5-Pack 3089 Gate Opener or Garage Door Opener Remotes by Multi-Code