Garage door remotes GTXU1, GTXU2 and GTXU-3 is UHF which is discontinued , the PC Board color is blue and there is no 9 DIP switches on the circuit board. The surface of the remotes looks the same as TM-27, but they are not the same. Adoption a conversion kit MK702GL is the solution if you have GTXU1, GTXU2 or GTXU-3. To set up is very simple just plug and play installation that taking a couple of minutes.
You existing remotes will still work after you install the receiver set..
Some of garage door remotes like GTXU1 , GTXU2 and GTXU3 looks the same as TM-27, but they are totally different from TM-27..
This one has been upgraded to MK702GL.
Its also avaible MK701GL.