Specification: Material: ABS Colour: Black Plug: EU, US, Australia, UK (optional) Power: 2 * AAA batteries (not included) Voltage test range: 0.1V~250V / 40~1kHz RCD current: >30mA RCD working voltage: 220V20V Working voltage: 2.6~3.3V Working environment: 0C~40C, 20%~75% RH Storage environment: -10C~50C, 20%~80% RH Item Size: Approx. 64.5*64.5*58.2mm / 2.54*2.54*2.29in Item Weight: Approx. 69 g / 2.43 oz Package Size: Approx. 125*75*70mm / 4.92*2.95*2.76in Package Weight: Approx. 135g/4.76oz notes: When applying the leakage switch protection detection function, please turn off all electrical appliances and do so when permitted to ensure that the power failure will not cause any harm. Features: - Compact & Portable: Advanced socket tester for rapidly detecting whether the wire connection of a socket is correct or not. Compact size & light weight, convenient to use. - VA Color Display Screen: The high-definition display can see the screen value clearly in the dark environment. - 8 Display Patterns: With 8 easy-to-read indicators to indicate the state of the socket, easy to judge: Wiring correct, miing neutral wire, miing earth wire, earth wire is miing, reversed order, reversed order, lack live wire, live symbol. - Non-contact Induction: When a nearby AC voltage is detected, the lightening symbol/index gr-id flashes and an alarm beep sounds. - RCD Test Button: When the button is preed and there is no trip and power failure, there is no leakage protection. One Click to know the working state of the leakage protector, protecting your security against the risk of electric shock. - Wide Application: Widely used for electric maintenance testing, office sockets testing, power strips testing and wall sockets testing in schools, laboratories, factories and other social fields. Packing List: 1 * Socket Tester 1 * Users Manual(English)