Klein Tools NCVT1PKIT Electrical Tester Kit with Non-Contact Volt Tester, 50 to 1000V AC and GFCI Receptacle Tester, 2-Piece

Quit working after a short time. Warranty is out. Trash can fodder.

As an electrical inspector of 37 years, This is my go to set of safety tools. One: you need to verify the circuit is energized for testing and - two: the GFCI function and correct wiring of the receptacles need to be tested using this plug in tester. It applies the rated fault to the device and trips it off at your pressing the test button. Very strong, easy to use.. A+ rating...

Quality product, as advertised.

If you own a home, chances are you will need to see if a wire is hot or not at some point. Same thing goes with troubleshooting or rewiring outlets. This gives you both the tools you need from a brand you can trust for a very reasonable price.