The youngest of the three strongest models, excluding special models, is the M-X (a premium model in the M series). The cable length has been cut to the bare minimum for practical use. This is because shorter cables improve efficiency. The terminals have also been changed to those for high-end audio. This is also to improve efficiency. I seem to remember that I had the cable diameter made thicker as an option, but I'm not sure, so it's not reflected in the price. Although it is a used item, the performance is the same as new. - Model: Micro Reactor M-X - Brand: Orbitron As a bonus, I'm including the latest model, Monoblock System C3 (new) Price: ¥25,300!! ORBITRON products neutralize and remove static electricity generated in the vehicle body by supplying electrons, reducing friction. These are high-performance automotive parts designed to improve acceleration, torque, fuel efficiency, and comfort in cars and motorcycles. Installation is simple: just sandwich it between the nut on the negative terminal of the battery and tighten it. Just that simple, and you get a power boost!! It is also extremely versatile and can be installed on any vehicle as long as there is physical space. If you are concerned about your car's grounding, aluminum tape tuning, fuel efficiency, shocks, static electricity, friction, response, suspension, horsepower, torque, engine, audio sound quality, harshness, or roll, please consider this. This is an OEM product from a manufacturer that also produces products for Maniacs, which tunes Audi, Volkswagen, Benz, and Porsche. This is a superior version compared to the Maniacs version. I removed it because I am selling my car.