374LM

374 Security + 4 Channel remote Control 315 MHz  can activate 4 separate commercial or residential garage door openers/and or gate openers.  Four push buttons work with the Security + receivers having the purple"learn" button.  The rolling code between the channels and the receivers changes with each use.  The 4th button is capable of learning or matching another CDI manufactured fixed code or billion code remote ( in this case the code will remain constant)