Bhado Mihado Distribution Board & Car Product description from the following site: ■ Product Name: Bhado))) Distribution Board & Car ■ Size: 50 x 30.5 x 3mm By attaching it to the distribution board in your home or office, you can take measures against electromagnetic waves and also save electricity. Attach it under the main power source of the distribution board to convert all electricity and electromagnetic waves in your home or office into useful energy. It provides peace of mind for electromagnetic wave countermeasures and all-electric homes. Attaching it to the engine or battery of a car makes the engine quieter, improves acceleration, improves fuel efficiency, and clarifies the in-car sound. *Please understand that this is a used item before purchasing.