The Vtg HOYT Model 655 6-12 volt Auto Battery & Regulator Tester is a reliable and durable tool for testing and charging lead-acid batteries in vehicles. Made in the United States by the reputable brand HOYT, this tester is capable of testing batteries at 6V and 12V with the manufacturer part number 655. Despite the lack of a warranty, this product is a valuable addition to any automotive tool collection, providing accurate and efficient testing capabilities for car batteries.