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 Mike Sutherland

Bought the one with the sensitivity switch because so many complained it's too sensitive. With the sensitivity switch on, it detects voltage in the wire whether the fence is plugged in or not. With the sensitivity off it works perfectly. So much better than my old two prong wired light I can only use at night because I can barely see it: this lights up well and also beebs for me too.