WH305 Electrical Socket Tester Circuit GFCI Check Standard AC Receptacle Tester Features: It can easily test whether your socket is, and it is a good helper for the electrician! The new small electroscope, easy to carry, good workmanship and good hand feel, can be compared with non-general low-grade electroscopes! The following faults can be detected: open circuit of neutral wire, open circuit of live wire, open circuit of ground wire, reverse connection of live wire and neutral wire, reverse connection of live wire and ground wire, reverse connection of live wire and ground wire without ground wire, and detect leakage protector. It is easy to carry and can easily test whether your socket is. Made of superior and durable materials, the service life is longer. Product Description: WH305 Electrical Socket Tester Circuit GFCI Check Standard AC Receptacle Tester Material: Plastic Color: as the picture shows, (Due to the difference between different monitors, the picture may have slight color difference. please make sure you do not mind before ordering, Thank you!) Made of superior and materials, the service life is longer. It can easily test whether your socket is, and it is a good helper for the electrician! The new small electroscope, easy to carry, good workmanship and good hand feel, can be compared with non-general low-grade electroscopes! The following faults can be detected: open circuit of neutral wire, open circuit of live wire, open circuit of ground wire, reverse connection of live wire and neutral wire, reverse connection of live wire and ground wire, reverse connection of live wire and ground wire without ground wire, and detect leakage protector. It is easy to carry and can easily test whether your socket is.