• 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

Klein Tools Receptacle Testers are designed to detect the most common wiring problems in standard and GFCI receptacles. A convenient chart on the tester helps determine wiring condition in outlet, based on LED lights results. Conditions indicated: open ground, reverse polarity, open hot, open neutral, hot/ground reversed.