Klein Tools RT110 Outlet Tester, AC Electrical Receptacle...
Outlet tester’s light sequence on receptacle tester indicates correct/incorrect wiring
Receptacle tester conforms to UL Std 1436, Certified to CSA Std C22.2 #160
Operating temp: 32-degrees F to 140-degrees F (0-degrees C to 40-degrees C)
Amazon.com Price: $9.97 (as of 05/06/2023 07:55 PST- Details)
Outlet tester’s light sequence on receptacle tester indicates correct/incorrect wiring
Receptacle tester conforms to UL Std 1436, Certified to CSA Std C22.2 #160
Operating temp: 32-degrees F to 140-degrees F (0-degrees C to 40-degrees C)
Built to withstand a 6.6-foot (2m) drop
Nominal Voltage: 110/125V AC at 50/60Hz in 3-wire outlet
Designed to detect the most common wiring problems in standard receptacles

Amazon.com Price: $9.97 (as of 05/06/2023 07:55 PST- Details)