Paul,
I think you are refering to the cars ecu, The ecutalk is just a diplay of the OBD, I beleive it can do changes only while the ignition is on and returns when off...
Montie.
they are ever so slightly smaller than a din socket. I have mine installed below my radio but above the ashtray...
pretty cool at dispaying stats etc , just have to figure out what they all mean.. doh! oh & update the firmware as well, havnt tried that one yet...
Ps much bigger than ash tray
Dazza