The Snap On Tool LCD Circuit Tester 6 to 12 Volt model number EECT400 is a digital display unit designed for passenger vehicles. Manufactured by Power Probe, this circuit tester is suitable for diagnosing electrical systems in vehicles ranging from 6 to 12 volts. With a no warranty policy, this tool provides accurate readings for troubleshooting and maintenance purposes. Ideal for automotive professionals and enthusiasts looking for a reliable and efficient diagnostic service tool.