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 be 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, power strips testing and wall sockets testing in school, laboratory, 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 Model: HT107B(US) Operating Voltage: 90~250V/45~65 Phase Voltage: 90~250V/45~65 Leakage Voltage: 0~99V/45~65 Accuracy: (2.0%+2) GFCI Test: 5mA (US Plug) GFCI Working Voltage: 110V20V Working Environment: 0 ~ 40, 20% ~75%RH Storage Environment: -10 ~ 50, 20% ~80%RH Plug Type: US Plug, it applies to Canada, , Mexico, Thailand, Taiwan, the , the Philippines and so on. Colour:Photo Color Material:ABS Size:about 68 x 65 x 60mm Package Contents: 1 x Electric Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.