Well I installed my very first Ignition interlock on a car, the type where you have a PBT to blow into start the car. If the person who is to fail the test it won't start but if he passes and then ever 2 minutes he has to retest or else the cars horn and hazzards will go off like a car alarm. Pretty Niffty device I think but when is it too much to have a guy drive behind the wheel?:huh: