1. [GFCI Function] This electrical tester tests GFCI equipment by simulating a ground fault condition, which is suitable for GFI outlets, and confirms the operation of the ground fault protection device. 2. [Voltage Display] This GFCI tester with LED display can help you measure the voltage of the outlet, and it is clearly displayed on the LCD screen for easy observation. 3. [Durable and sturdy] Compact ergonomics and high-impact ABS shell, good shock and compression resistance, complies with CAT III 300V and CE marking. 4. [Easy to Use] The socket tester can detect open wiring faults through open ground, open heat, neutral, reverse polarity and reverse thermal neutral wires. 5. [Application Range] This outlet tester can detect the most common wiring faults in standard and GFCI outlets, and also uses standard 3-wire and GFCI protected 220 volt AC outlets. Specifications: Item Type: Power Socket Tester Material: ABS Model: HT107D Plug: European Plug 90~250V Uses: Industrial, Household Working Voltage: 90~250V/45~65Hz Phase Voltage: 90~250V/45 ~65Hz Accuracy: (2.0%+2) Leakage voltage measuring range: 0~99V/45~65Hz Accuracy: (2.0%+2) Operating temperature: 0 ~ 40 Working Humidity: 20 %~75% Storage temperature: -10~50 Storage humidity: 20% ~ 80% RH Altitude: 2000 meters RCD current: >30mA RCD working voltage: 220V 20V GFCI Test: >5mA Working voltage GFCI: 110V20V Package List: 1 x Digital Display Socket Tester 1 x Manual Note: 1. The detection time cannot exceed 5 minutes 2. Be careful not to touch the RCD button during use, so to avoid accidentally triggering the leakage protection switch and causing unnecessary losses.