Review on Neoteck Voltage Tester/Non Contact Voltage Tester 12-1000V/48-1000V Adjustable Sensitivity AC Voltage Detector Tester Pen Live/Null Wire Tester With LCD Display Buzzer Alarm Wire Breakpoint Finder by Kevin Huot

Simple and inexpensive. I used this for home electrical work such as rewiring a bathroom, adding a GFCI and replacing switches and outlets. I already knew the basic circuit breaker blueprint, but I have become tired of being electrocuted when either what I am told or what I assumed is wrong. This Neoteck tool helped me determine that I was working with two circuits and not one, thus protecting me from a possible shock. It also helped me determine that the previous owner wired a switch that I still have idea what it switches lol.It worked accurately every time I used it. I can be a bit paranoid so I verified each time on a live circuit that it detected 120vAC (the only voltage I have used it for thus far) as well as verifying that there is no voltage on what I am shoving my hand into to dig out wires. It did NOT detect voltage through drywall (nor did I expect it to), but did detect voltage at the wall plates. It does beep when it is bumped, but this is a characteristic of most brands in this price range. The solution is to approach the wire, outlet or area slowly, then wait for a persistent beep for a positive detection of voltage. I also did not think it was overly sensitive. I had to be pretty much on target for the tester to register voltage.I actually liked the light to look into the electrical box trying to trace where the wires I wanted went to.It seems a little cheaply made, but I tend to take care of my tools. However, accidents do and will happen. This would be my only concern is longevity, which I can not attest to since I have not had it that long.I would recommend it to anyone!