Circuit probe tester - More convenient and faster testing, designed for one-handed operation to speed up power circuit testing. Car circuit tester pen - Pen-style design for quick identification of wiring issues. - Helps quickly detect short circuits, test connections, and inspect wiring harnesses. Auto voltage tester - Auto test light probe for quick voltage detection in automotive and electrical applications. Warm tip - Due to lighting effects, monitor brightness, manual measurement, and other factors, there may be slight differences in color and size between the photo and the actual item. Thank you for understanding. Use scenarios - In a car, identify a short or faulty connection by probing suspect wires with the pen-style tester without dismantling components. - During aftermarket wiring or harness installation, verify that connections are proper and harnesses are correctly wired before powering the system. - In the workshop, perform quick voltage checks on circuits to determine live or dead status before maintenance or repairs.