The Autool Electrical System Circuit Tester is a versatile tool designed for vehicles ranging from motorcycles to heavy-duty commercial vehicles, operating on both 12V and 24V systems. This new tester includes a digital display, continuity testing capabilities, a voltmeter, and relay & component testing features. With included accessories such as a carrying case, clamps, and probes, this circuit tester by Autool is a must-have for automotive technicians and DIY enthusiasts alike.