Klein Tools Outlet Tester w/ GFCI

GFCI Tester detects the most common wiring problems in standard and GFCI receptacles
Works on GFCI outlets and confirms operation of the ground fault protective device
Built to withstand a 6.6-foot (2m) drop
Operating temp: 32-Degree to 140-Degree Fahrenheit (0-Degree to 40-Degree Celsius)
Nominal Voltage: 110/125V AC at 50/60Hz in 3-wire outlet