Secretly popular among car and audio enthusiasts, this is the ORBITRON "Smart Earth." Simply attaching it to the negative terminal of your car battery reduces static noise, elevating the soundstage and atmosphere inside your car to the next level. Many users experience improved engine response and more stable operation of electronic devices. It's a tuning item that subtly enhances the overall quality of your vehicle. This is a limited-edition item released to regular customers before the current model (sold as A1 on Amazon) was released. It is said to have slightly less capacity than the current model. If you're interested in car grounding, aluminum tape tuning, fuel efficiency, shocks, static electricity, friction, response, suspension, horsepower, torque, engine, audio, sound quality, harshness, or roll, then this is for you. This product is from a manufacturer that OEMs products for Maniacs, a company that tunes Audis, Volkswagens, Benzes, and Porsches, among others.