A launch controller is only as good as it is safe and convenient. When armed, the Interlock controller emits a warning tone to alert spectators to a possible launch and after firing the Key Eject system automatically disarms the firing circuit for the utmost in personal protection. Our Interlock controller is conveniently designed to hook up directly to your car’s 12 volt battery and to assist in placing you at a safe launch distance, incorporates 40 feet of heavy-duty power cord.