This tester combines 2 of the most popular testers used by electricians, inspectors and homeowners into a single unit. First it’s a non-contact voltage tester that detects 50-1000-Volt AC, or Alternating Current. Plus it also tests GFCI Outlets to determine whether the wiring is correct and show exactly what the wiring error is if one exists. It’s available at The Home Depot.
Watch the video above for more details.