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Liftmaster TX2EV/TX4UNIS(Merlin+2.0) manual

Program to Gate / Garage Door Openers the same way as original Chamberlain LiftMaster remote control, please refer to your opener user manual. 
The standard programming procedure is as follows : 
1. Press and release "S" button for 1-2 seconds on the opener. The LED begins to glow (for aprox. 10 seconds).
2. Briefly press  the desired button of the new remote control. The LED goes out. The new remote control is programmed.
To erase all remotes, press "S" button for aprox. 8 seconds until the LED goes out. All programmed remotes are now erased. 
Reprogram each remote control you wish to use.