The intelligent socket tester is mainly used for the polarity detection of the power socket wiring and the safety detection of the leakage switch. It can quickly and accurately detect the wiring situation of the socket. It is an intelligent digital display tester. The voltage and frequency of the socket can be detected and if the wiring is correct or not. Feature * Intelligent detection to ensure the safety of household electricity. RCD test, one-key detection of leakage protector status. * As a general measurement tool and widely used in the school, laboratory, factory and other social field. Lightweight and handy size, easy to carry and storage.* With three indicators and LCD screen, it is easy for a newer to use it. * The program has six states, but only one state can be displayed at a time: correct, miing ground, miing neutral, live neutral reverse, live ground reverse, live ground reverse&miing ground. * The voltage and frequency are displayed on the lower part of the LCD screen. Specification Material: ABS Color: blackMeasuring voltage: 90-120V 60Hz, 220-250V 50-60Hz (optional) Voltage measurement accuracy: (2%+5)Working current: 30mARCD operating voltage: 220V+20VPackage size: 67 * 60 * 45mm / 2.6 * 2.4 * 1.8inPackage weight: 95g / 3.4ounce Packing List 1 * Socket Tester1 * User Manual