Signal initiation by switched 12 v. rather than button push

I have an application for your receiver, but I need for the transmitter to be actuated by application of 12 volts rather than pushing a button. That is difficult to do with a fob. If you have a button push transmitter that can be powered by 12v while the button contacts were shorted, that would work. Is such a thing available?

Sorry we don’t have that,
One workaround is to do some mod on our current keyfob,

  1. Convert 12vdc to 3.3vdc using some down converter modules.
  2. Solder one of our keyfob button, so when powered on->start transmitting.

It’s a ugly solution, maybe you can check if products from other suppliers have what you want,