1. Advanced and easy-to-use . Quickly and intelligently measure whether the socket connection line is correct. And through the fully backlit screen, various wiring status can be clearly displayed, even in a dark environment. Moreover, it is small in size and light in weight, and the use process is very easy and pleasant.2. AC voltage measurement. AC voltage can be accurately measured and displayed on the screen in real time. The measuring range is 30V-250V.3. Designed with RCD/GFCI Test Button, One Click to know the working state of the leakage protector. Perfect for protect your security against the risk of electric shock.4. Data storage function. It is convenient to record the voltage at different times or in different environments, and it can store up to 20 groups.5. Wide application. Widely used for electric maintenance testing, office sockets testing, strips testing and wall sockets testing in school, laboratory, factory and other social field. Home improvement acceptance and safety inspection,It saves you lots of time in testing problems with sockets.Plug Type: Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on.Voltage Measuring: 30V~120VRCD Test: Greater than 5mARCD Working Voltage: 110V20VWire Connection Status Judge: Seven typesDisplay: Full Backlight LCD ScreenStatus Indicator Light: Red and greenDate Storage: 20 GroupsLow Battery Indicator: YESOperating Temperature: 0 ~ 40Battery: 2*CR2032 (Not included)DIY Supplies:ELECTRICALDisplay Type:Digital OnlyDimensions:About 82 x 65 x 80mm Supply:BatteryOperating Temperature:0 ~ 40Model Number:FY1881color:BlackMaterial:plasticPackage Contents:1 x Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.