GB GFI-3501 Circuit Analyzer with GFCI Tester

https://youtu.be/UNoUKM5l4t0

Gardner Bender GFI-3501 Ground Fault Receptacle Tester & Circuit Analyzer, 110-125V AC, for GFCI / Standard / Extension Cords & More, 7 Visual LED Tests , Red (Amazon Affiliate)
US: https://amzn.to/43zVeyQ