Using the Klein Tools 69105 Circuit Tester is a breeze. First, make sure the circuit you're testing is within the 80 - 600 volts AC/DC range. Then, simply connect the probes to the appropriate points in the circuit. The high - visibility neon lamp indicator will show you the results. When not in use, store it in a dry place away from extreme temperatures. Avoid dropping or subjecting it to strong impacts as it can damage the internal components. Periodically check the leads and probes for any signs of wear or damage. If you notice any issues, it's best to get it checked by a professional before using it again.
