Southwire 40022S Analog 120-Volt GFCI Receptacle Tester

The push button GFCI test allows you to quickly test that the GFCI trip function is working. 120V AC receptacle tester with push-button GFCI test. 7 Tests in one: open ground, open neutral, open hot, hot and ground reversed, hot and neutral reversed, correctly wired, and GFCI.

eBay