S.W.A.T. Steering Wheel Anti Theft Auto Alarm With 3 Theft Deterring Features Flashing Strobe Light: Lights up inside of vehicle when alarm is activated. Night-blinds intruder and can be seen for over a quarter-mile. Calls attention to intruder. Large Flashing LED Lights: Led's flash alternately and continuously when alarm is locked on steering wheel and armed. This lets potential intruders know the vehicles is protected with an active alarm. Theft Deterrent! 130 db Ear-Piercing Alarm: This is an extremely loud alarm that can be painful. Most people cannot tolerate this level of sound for more than 5 or 10 seconds. High-Low sensitivity setting Strobe, LED's & internal alarm ideal addition to "layered" alarm systems