KAIWEETS Voltage Tester/Non-Contact Voltage Tester with Signal Percentage, Dual Range AC 12V/70V-1000V, Live/Null Wire Tester, Electrical Tester with LCD Display, Buzzer Alarm, Wire Breakpoint Finder

This one is cheaper than the Klein Tools pen. It comes with led indicators and a flash light. I was easily able to determined which wire is the Line (pictured) and which one is the load (less voltage coming through). Neutral & Ground are more universal in their labeling. No need for any fancy tool when this one gets the job done.

Works very well it’s durable, easy to use and to see and hear the results good quality, solid design, provides protection, fast and the sound quality matches the voltage readings i recommend this device as it will help you learn about harnessing the electrical energy into usable power in a safe way

Works for its intended purpose

This is a perfect voltage tester that you can carry in your pocket and the price is right it works great

Seems to work and comes with warning not to rely on it entirely. I tend to agree. It would turn on when I put in AB alkaline batteries. Then I tried rechargeable ones and it still would not turn on. I was ready to turn it back when I notice two batteries on the table. Must have fell out unnoticed. I put in the non-alkaline batteries (no less) and it turned on instantly even though the manufacturer says to use alkaline batteries which did not work. I then took out the plain mercury batteries and reinstalled the AB alkaline and it turns on and seems to work. Jiggle around the sensor to make sure it captures the loose AC radiation and so far it works in capturing them showing the wire or connection is HOT.

handy, small, and easy to use. Non contact sensor works great

The media could not be loaded. The Non-Contact Voltage Tester is a straightforward and reliable tool for detecting electrical current.It only require to install two AAA batteries (included) to set up.The device is incredibly user-friendly: simply touch the cable or socket, and it clearly indicates whether current is present it is quite sensitive and it emits a sound. The build quality feels solid, and its compact size makes it easy to carry for quick checks. It also comes with a light.The accuracy to detect current is very good, but it does not give you a value of the voltage. For simple and effective voltage detection, this tester is a good choice.

I like that this can have the sensitivity range set, and that it gives feedback (on the screen) of how strong a signal it is getting. This reduces some "false positive" results from phantom power.However, the normal safety precautions for non-contact voltage detectors are *absolutely critical* here. For some reason, my unit would periodically turn off with no warning. It didn't appear to be a timeout, but rather just a sudden loss of power. Thus, I could not rely on "no beep == no power" as is somewhat reliable on other similar devices. To refresh, the safety protocol is:1. Test live-suspect-live. That is, after turning the device on, put next to a known-live wire (beeps), then next to your maybe-not-live wire (no beep if really not live) then back to the known-live wire (beeps again). If the device loses power, that last step *will not* beep, indicating an issue.2. Always rotate the tip of the NCV when exploring a box! When the "flat" part is parallel to the wire you will usually get a reading, while you will often *not* get a reading if it is orthogonal to the wire.3. Never rely on just the NCV, but also use a multimeter before touching any exposed metal. The NCV is *great* at determining hot vs neutral, but much less definitive than a solid connection between those two with a multimeter that determines if they have power or not. There are also cases where multiple hots can "cancel out" leading the NCV to conclude there is no power when in fact there is.