Item Type: Socket Tester_x000D_ Material: ABS_x000D_ Main Functions: 3-pin socket line sequence detection, phase voltage (L_N) detection, leakage voltage (N_E) detection, leakage switch (RCD) detection_x000D_ Working Voltage: 90-250V 45-65HZ_x000D_ Phase Voltage Measurement Range: 90-250V, 45-65Hz, Accuracy: (2.0%+2)_x000D_ Leakage Voltage Measurement Range: 0-99V/45-65Hz, Accuracy: (2.0%+2)_x000D_ Working Temperature: 0-40_x000D_ Working Humidity: 20%-75%RH_x000D_ Storage Temperature: -10-50_x000D_ Storage Humidity: 20%-80%RH_x000D_ Altitude: 2000 Meters_x000D_ RCD Current: >30mA_x000D_ RCD Working Voltage: 220V20V_x000D_ GFCI Test: >5mA_x000D_ GFCI Working Voltage: 110V20V (ground fault current leakage protector; it is a special protection device for the North American market)_x000D_ _x000D_ _x000D_ How to Use:_x000D_ Plug the tester into a standard 3-hole power socket. When an error in the socket wiring sequence is detected, the red backlight will light up to indicate a wiring error. Then observe the indicator and the function comparison table to determine what kind of socket wiring is wrong, and then unplug the tester. When the wrong wiring is detected, please find a professional electrician to repair the wiring._x000D_ RedRedRed_x000D_ Correct_x000D_ Missing Ground_x000D_ Missing Neutral Line_x000D_ Missing Live Wire_x000D_ Live and Ground Reverse Connection_x000D_ Live and Neutral Line Reverse Connection_x000D_ Live and Ground Wire Are Reversely Connected, Lack of Ground_x000D_ _x000D_ Note: Phase and ground are wrong and lack of ground: the live wire and the ground wire are reversely connected, and the ground wire is not connected. This tester cannot distinguish between the reverse connection of the neutral wire and the ground wire.