Power Circuit Probe Tester with Extra 20Ft Extension Cable Continuity/Polarity Circuit Tester AC&DC Voltage Tester Resistance/Diode Electrical Tester Buzzer Prompt Circuit Breaker Finder for 0-65V

Product description Some FAQs:Is the Power Scan Probe Tester computer safe? Power circuit probe tester LED and LCD current no more than 1 mA, so the power circuit probe tester is safe for computers when used as a test light or multimeter.However, pressing the power switch is a different story.

When you press the power switch forward, you are conducting full battery current to the tip of the probe.There is a nice safety feature built into the tool.

Simply connect the extra ground lead to the tool and press the power switch forward until it trips the circuit breaker.This will prevent power from going to the tip but still allow you to use the tool as a multimeter.When you are away from computer components, simple press the reset button and you are ready to power up again.