PORTABLE ELECTRIC -- Advanced for detecting whether the socket's wire connection is correct 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 protect your security against the risk of electric shock. BRIGHT LED DISPLAY --- Light patterns are well 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 judge: Correct, 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, factory and other social field. Home improvement 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) GFCI Test: 5mA (US Plug) GFCI Working Voltage: 110V20V Operating Voltage: 90~250V/45~65 Phase Voltage: 90~250V/45~65 Leakage Voltage: 0~99V/45~65 Accuracy: (2.0%+2) Working Environment: 0 ~ 40, 20% ~75%RH Storage Environment: -10 ~ 50, 20% ~80%RH Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Colour:black Material: ABS Package Contents: 1 x Electric 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.