ELECTRICAL OUTLET TESTER: Advanced socket tester for quick detection of the correct electrical connection of the socket. DESIGNED USING THE RCD / GFCI TEST BUTTON: Power outlet is properly wired and RCD / GFCI tripping function.It can test protection system to ensure home electrical safety. EASY TO USE: Detect the neutral line, connect the wires and ground wire correctly and indicate which line is missing from bright light mode. LED LIGHTS AND 3 TEST LIGHTS: The lamp holder icon is labeled on the surface of the socket tester. The tester has a built-in light, so it can also be used in the dark. Read test results quickly and easily. WIDE APPLICATION: Widely used for electrical maintenance testing in schools, laboratories, factories and other social spaces, power outlet testing, power strip testing, and wall outlet testing. Specification: Condition: 100% brand new Model: HT106B Voltage range: AC 48 ~ 250V GFCI test: 5mA RCD test: 30mA Measure the voltage (with LCD): 48-250V / 45-65Hz, precision: ± (2.0% + 2) Voltage measurement (90V-250V / 45-65Hz) - Yes LCD display - Yes Backlight - Yes / p operating temperature: 0 ° C-40 ° C Operating humidity: 20 to 75% relative humidity Storage temperature: -10 ° C to 50 ° C Storage humidity: 20% ~ 80% RH Altitude: ≤2000m Socket connection detection: Correct connection; Ground wire not connected; Neutral wire not connected; Live wire not connected; Live wire and reverse ground wire; Live wire and neutral in reverse order; Live wire and bad ground wire; Missing ground wire. Style Plug: HT106B European Plug Weight: approx. 79-90g / 2.8-3.2oz Size: approx. 66 * 62 * 60mm / 2.6 * 2.4 * 2.4in Package List: 1 * Socket Tester Note: It does not include other things, the color is based on the first picture and other pictures only show effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement . Please allow deviation. Thank you!