I have a Blaupunkt Casablanca and ThummerIII/RC-09. Tested w/ HiJack, but got no response from Hijack button code screen.

The RC-09 would be a great remote as it uses a switch for changing modes b/w HU and Navigation unit. This gives a Empeg only installation something like 18 buttons (9x2) available. With Blau HU and Empeg, you'd have 9 for HU and 9 for Empeg.

Anybody know the signal freq. for Blau Thummers?

Keil