Non-Contact Voltage Tester, AC Voltage Detector Pen with Screwdrivers, Dual Range 12V-1000V/48V-1000V, Adjustable Sensitivity, LCD Screen, LED Flashlight, Alarm Mode, Live/Null Wire Judgment

Never failed!!! Clear sound, and good quality!

I was little hesitant initially reading the reviews but this product is good. I wish they gave a small holder / pouch to hold them together.

You got to have this if you're dealing with an old house's /Old wiring that you cant tell whats wht or black/and it wont break the bank

This type of tool always drives me crazy. I can't figure out how to use it correctly, the results aren't clear enough, and I end up nothing but frustrated.This? This worked perfectly and immediately on the first try. I actually jumped back and semi-yelled, "It worked!!!" No moving the tip around to get a reading, no moving it closer and farther, no guessing or judging, it just gave me the reading clearly and immediately.I wish all tools that rely on providing a reading worked this well, clearly, and quickly.

Does the job.. finds power lines behind the wall... but says 25V+ is DANGER WILL ROBINSON!!DANGER! but it works.

Great.Does what it's supposed to do.Instructions are simple and informative.

Works well. My guess is that these things either work or dont and for the work i was doing it seemed to be able to detect power very accurately

It works ok but I almost always need to put it in max sensitivity mode.