Feature:1. LCD display with backlight display, display voltage and frequency.2. Plug and play, no battery required. One‑key detection circuit safety.3. Widely used in schools, laboratories, factories and other fields.4. Easy to use, overall non‑slip design, comfortable hand feeling.5. Compact size, lightweight and convenient, easy to carry and store.Specification:Item Type: Socket TesterMaterial: ABSColor: As shown in the pictureModel: ET89EUPlug: EU AC220V-250VApplication: Socket testBasic Parameters:Measuring Voltage Range: 90~250V/45~65HzWorking Current of the Whole Machine: <3mA (in non-RCD state)Accuracy: ±(2.0%+5)Working Temperature: 0-40℃Working Humidity: 20%~75%RHStorage Temperature: -10℃-50℃Storage Humidity: 20%-80%RHAltitude: ≤2000mRCD Current: >30mALCD Working Voltage: 220V±20V.Package List:1 x Socket Tester1 x Instruction Manual