Receptacle Tester with GFCI Alert Type Light CAT Safety Rating CAT III 300V Display Screen Type No Display Display Type No Display Features Advanced Ground Testing Circuitry Precisely Detects the Required Low Resistance Values Bright 360 LED Indicator Light Single LED Provides Immediate Indication of the Wiring Error For Voltage Range 125V AC Frequency Rating 60 Hz Ground Impedance 0.00 to 1.99 ohm Load Current 20 A NEMA Plug Configuration 5-15P