The Charge It By Solar Model 4506 is a single 12V charger manufactured by Solar. It comes with a California Prop 65 Warning indicating that it may expose users to Vinyl chloride, a chemical known to the State of California to cause cancer. This charger is specifically designed to charge batteries and is a valuable addition to any automotive tool and supplies collection. For more information on this product, please visit the company's website at www.P65Warnings.ca.gov.