1. Smaller Size, Optimum Efficiency The C823 Power Scan Kit is the revolutionary circuit tester for 1224V vehicles (3.5V36V). You can access four precise diagnostic modes (DC Voltage, Positive and negative poles), providing efficient electrical system testing, continuity testing, fault diagnosis, ground testing without fuses, component activation on and in the vehicle, and voltage detection. 2. Directly Usable Just attach the clip to the car battery, you'll have an instant hot lead or ground lead. Use the probe tip and ground lead together to power up components in your hand. Easy to apply, it can power components such as radiator fans, starter motors, relays, window regulators, and windshield wipers. Quickly check components for continuity, identify positive, negative and open circuits, and locate shorts without wasting fuses. 3. Clear Voltage Value Display, Overload Beeping Warning Our power circuit probe kit is equipped with a blue LCD voltage display, and the end is also equipped with an illuminated LED, which meets the need to work in the dark. Equipped with overload cutoff and beep warning for r use. 4. Positive and Negative Polarity Test Without pressing the key on the tester, you can use the surface probe in front of the tester to detect the unknown polarity on the car, check whether it is charged or positive polarity (LED bright red) or negative polarity (LED bright green); press the corresponding key, you can test the voltage.