PORTABLE ELECTRIC -- Advanced for detecting whether the socket's wire connection is or not. Compact size, light weight and convenient to use. With voltage backlight LCD display for testing voltage.PLUG & PLAY --- Designed with RCD/GFCI Test Button, One Click to know the working state of the leakage protector. Perfect for your security against the risk of electric shock. LED DISPLAY --- Light patterns are labeled on the back of the device itself. The Red LED indicators can up clearly even in strong sunlight also be used in the dark, making you read it fast.6 LED LIGHT PATTERNS --- With 6 easy to read indicators to indicate the state of the socket, easy to : , Open Ground, Open Neutral, Live/Neutral Reverse, Live/Ground Reverse, Live/Ground Reverse, Missing Ground.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. acceptance and safety inspection,It saves you lots of time in testing problems with sockets.NOTE: Please Be Mind, The Displayed Voltage Value Only For Reference : HT107B(US)Operating Voltage: 90~250V/45~65Phase Voltage: 90~250V/45~65Leakage Voltage: 0~99V/45~65Accuracy: (2.0%+2)GFCI Test: Greater than 5mA (US Plug)GFCI Working Voltage: 110V20VWorking Environment: 0 ~ 40, 20% ~75%RHStorage Environment: -10 ~ 50, 20% ~80%RHPlug Type: US Plug, it applies to Canada, , Mexico, Thailand, Taiwan, the United States, the Philippines and so on.Colour:Photo ColorMaterial:ABSSize:about 68 x 65 x 60mmPackage Contents:1 x Electric Only the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.