Sorry, I got little mixed up thinking about unxl sensors vs frequency
before going out on town to sing; had drink as you could tell.lol

Meant that these auto remotes use flash; however instead of
manipulating codects via a processors they couple
flash circuitry/buttons and send varying signals at
specific frequencies to start/unlock/alarm etc.,

Wonder if they are infrienging, huge market.

Bottoms up up up

e