 A lockout system is armed when the driver turns the ignition key to the "on" position and carries out a specified action, usually flicking a hidden switch or depressing the brake pedal twice.It is activated when the vehicle drops below a certain speed or becomes stationary, and will cause all of the vehicles doors to automatically lock, to prevent against thieves stealing the vehicle when it is stopped, for example at a traffic light or pedestrian crossing.A transponder system is a system which is always armed until a device, usually a small RFID transponder, enters the vehicle's transmitter radius.