"The Autotaser locks to your steering wheel. A remote control arms it with 50,000 Volts of immobilizing power. It comes with window stickers to forewarn intruders. Any motion or vibration like a window breaking, a door being jimmied, or someone getting into or moving around in a car will set off a very loud 130 decibel alarm from the device. Five seconds later the Autotaser emits 50,000 Volts - enough to stun a person and make them immobile. The 50,000 volts continues intermittently for up to four hours on it's own power source. The car horn, lights and battery are not affected. Blue sparks are visible that radiate 2" from all around the device. Anyone entering any part of their body or clothing within that 2" electrical field will be rendered immobile. "Lock the Autotaser to your steering wheel with the key provided. It is adjustable, so it is very fast and easy to attach to your steering wheel. Position the end of the device over your car stereo so it is also protected. Lock your car as usual first, and then arm the Autotaser with your remote control. When you return to your car, disarm the Autotaser with your remote first, and then approach and unlock your car. Autotaser effectively protects your car 4 ways and does not interfere with any other auto alarms your car may already have. "The Autotaser comes with one Remote. Over 1 billion codes with code hopping technology prevents thieves from duplicating your remote.Air Taser