Advanced HABOTEST Socket Tester can help you check the house wiring and connection polarity of the socket, it can also use to test leakage tripping. It is a professional socket tester that rapidly detects whether the socket's wire connection is correct or not. With RCD/GFCI test function, it is more practical and safe. PORTABLE ELECTRIC SOCKET TESTER: Advanced socket tester for rapidly 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 protecting 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 light 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 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 fields. Home improvement acceptance and safety inspection, It saves you lots of time in testing problems with sockets Specification: Brand Name: HABOTEST Model: HT107B(US)/HT107D(EU)/HT107E(UK) (Optional) Material: Flame Retardant ABS Operating Voltage: 90~250V/45~65Hz Phase Voltage: 90~250V/45~65Hz Leakage Voltage: 0~99V/45~65Hz Accuracy: (2.0%+2) RCD Test: 30mA (EU/UK Plug) RCD Working Voltage: 220V20V GFCI Test: 5mA (US Plug) GFCI Working Voltage: 110V20V Working Environment: 0 40, 20% 75%RH Storage Environment: -10 50, 20% 80%RH Item Size: 68 * 65 * 60mm / 2.7 * 2.6 * 2.4in Item Weight: 74g/2.6oz Package included: 1 x Electric Socket Tester Other items not included