1、[GFCI Function] This electric tester tests GFCI equipment by simulating a ground fault condition, which is suitable for GFI sockets, and confirms the operation of the ground fault protection device. 2、[Voltage Display] This GFCI tester with LED display can help you measure the socket voltage, 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, compliant with CAT III 300V and CE marking. 4、[Easy To Use] The socket tester can detect open wiring faults through open ground, open heat, open neutral, reverse polarity, and thermal neutral reverse wires. 5、[Range Of Application] This socket tester can detect the most common wiring faults in standard and GFCI power sockets, and also uses standard 3 wire and GFCI protected 220 volt AC sockets. Item Type: Socket Outlet Tester Material: ABS Model: HT107D Uses: Industrial, household Accuracy: ± (2.0%+2) Accuracy: ± (2.0%+2) Working Temperature: 0℃~40℃ Working Humidity: 20%~75%RH Storage Temperature: -10℃~50℃ Storage Humidity: 20%~80%RH Altitude: ≤2000 meters RCD Current: >30mA GFCI Test: >5mA 1 x Digital Display Socket Tester 1 x Manual