Feature: 1. Advanced socket tester for quick detection of the correct electrical connection of the socket, it can test the protection system to make sure electrical safety at home. 2. With LCD display, it can measure phase voltage (L_N) and leakage voltage (N_E) quickly and accurately. 3. 7 LED light modes, there are 7 kinds of easy‑to‑read indicators to indicate the status of the socket, easy to judge. 4. Widely used in electrical maintenance testing in schools, laboratories, factories and other social areas, office outlet testing, power strip testing and wall socket testing. It can save a lot of time to test socket problems. 5. Portable design, small size, light weight and easy to use. Specification: Condition: Brand New Item Type: Socket Tester Material: ABS Color: As shown in the picture Operating Temperature: 0°C~40°C Working Humidity: 20%~75%RH Storage Temperature: -10°C~50°C Storage Humidity: 20%~80%RH Altitude: ≤2000 m RCD Current: >30mA Red Red Red Correct connection ● ● ○ Unconnected ground wire ● ○ ○ Unconnected neutral wire ○ ● ○ Unconnected live wire ○ ○ ○ Live wire and ground wire reverse ○ ● ● Live wire and neutral wire reverse ● ○ ● Live wire and ground wire reverse, unconnected ground wire ● ● ● . Package List: 1 x Socket Tester1 x Instruction Manual Note: This tester can't distinguish between neutral wire and ground wire.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.