This is a photograph of the Cmos based Hijack Alarm No.3 circuit board. Like the first two Hijack Alarms - if a door is opened while the ignition is switched on - the circuit will trip. And after a few minutes delay - when the thief is at a safe distance - the Siren will sound. But this time the engine doesn't go on to fail automatically. Instead - it will continue to run until the ignition is switched off. Then - it won't re-start.