Crash sensors are used to detect a collision. If a collision occurs, the system will switch-off the engine, fuel and the electrical supply to minimise the risk of fire and can be programmed to automatically call the emergency services, your next of kin, or anyone else if no sound or movement is detected after a collision. Your designated contact will hear a pre-recorded message which notifies them of the accident and provides your exact location. The system automatically connects to the cars speaker system so that you can speak to the contact if you are trapped inside the vehicle.