NoteUS plug is "RCD current: >5mA." Product advantages: The smart socket tester is mainly used to detect the polarity of the power socket and the safety of the leakage switch. The large color display screen has left an excellent user experience for customers. At the same time, the socket connection status can be detected quickly and accurately. It can intelligently detect the presence of dangerous voltage. It can test the socket voltage and display it on the LCD. The product has four plug specifications (EU/USA/UK/Australia), which can meet the requirements of different countries and regions. Product description: Includes 7 different modes for you to read: correct/ground open/neutral open/real-time/NEU reverse/real-time/GRD reverse/real-time open/real-time ground reverse miing ground. Dangerous voltage warning: Yes. RCD/GFCI test: Yes. Working voltage: 2.6~3.3V. Test voltage range: 0.1V~250V/40~1kHz. Working temperature: 0~40. Working humidity: 20%~75%RH. Storage temperature: -10C~50C. Raw material humidity: 20%~80%RH. RCD current: >30mA. GFCI current: >5mA. RCD working voltage: 220V20V. GFCI working voltage: 110V20V. Battery: 2*AAA batteries. Does the package contain batteries: does not contain batterie