ER0983L Suitable for all universal cars Do not need any modification on 12V cars Makes the gasoline burn more fully via stabilizing the voltage and current of the whole car Effectively saves fuel Keeps the engine speed stable and strengthen torsion， output power and the whole performance of electric devices Balance the current system to prolong the service life of engine and automobile storage battery   Package Details Weight: 156.22 g Size: 13.00*8.00*5.00 cm Package Includes * Fuel Economy Tool