This set includes the NCVT-4IR Non-Conctact Voltage Tester with Infrared Thermometer and the RT210 GFCI Outlet tester. The NCVT-4IR provides non-contact determination of AC voltage in cables, cords, circuit breakers, switches, outlets and wires; as well as infrared (IR) thermometer measurements, making it the perfect choice for HVAC professionals. This lightweight, compact tool features a pocket clip for easy storage and quick access. The RT210 Receptacle Tester is 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.