Construction This tool is designed for regular use and is resistant to damage, delivering long term reliability. It comprises an automotive circuit tester component and a low voltage test light. Precise circuit testing The torque light tester provides precise circuit testing, helping you quickly identify powered circuits and improve wiring. Compatible with auto circuit testers and automotive circuit testers. High visibility voltage probe The high visibility voltage probe offers clear visibility of voltage values, even in dark or tight spaces. Compatible with automotive circuit testers and auto test lights. Durable design This tool is resistant to damage and provides long term reliability, including use as a hitch tester for pickups. Use scenarios - In vehicle electrical diagnostics to locate live circuits quickly during maintenance or repair. - During aftermarket installations to verify correct power and ground connections for accessories. - For trailer hitch wiring and pickup trucks to check voltage distribution and ensure proper operation.