For anyone who has two drivers in a car--
I have an AMB direct power "Pro" (the blue unit) transponder with a driver identification interface. This unit is designed for cars with two drivers. You could also just use it for a single driver but, it would be a waste of a ID unit.
The drivers ID unit plugs into a reciever and recognizes which driver is behind the wheel. I can send you pics---If interested call AMB and ask them about this unit---they are typically used at IMSA & Lemans type events. The unit is used and new cost $1,300 according to AMB. Make me an offer-- Transponder #0989070
I also have a rechargeable AMB tranx260 (with no charger)--although I think "Autobahn Shon" wants it.