The Cornwell Tools CTGCT300 LED Circuit & Continuity Tester is a single item product designed for automotive use. With dual polarity capabilities, this tester is ideal for checking the status of AGM, Gel, and Lead-Acid batteries. Featuring an LCD display, this tester provides clear and accurate readings for 12V batteries. Manufactured in China, this high-quality tool from Cornwell includes clamps as accessories, making it a convenient and reliable choice for vehicle maintenance and troubleshooting.