Features: Ensure electrical safety with the Socket Tester, to quickly detect socket wiring faults and verifying polarities using its advanced LCD digital display. This tester features a screen for clear visibilities in low light environment, automatic shutdown. Ideal for electricians, homeowners, property maintenance personnel, and anyone concerned with electrical safety, this tool provide essential data retention and leakage switches detection capabilities. Perfect for use in homes, offices, shopping mall, and other locations, the Socket Tester ensures that your socket correctly wire, preventing potential electrical hazards. With its user friendly design and comprehensive testing functions, including ground line polarities phase check, this device is a indispensable addition to any toolkit focused on electrical safety. Specifications: Material: Plastic, Board Measuring Parameters: Voltage: AC30-260V, 45-65Hz Leakage Voltage Ranges: 0-99V, 45-65Hz Trip Time Test: 10-1000mS LCD Display: YES Power Supply: 2xAAA Battery Requires(NOT Include) Size: About. 67x65x75mm/2.64x2.56x2.95in Pattern: 1/2/3 Package Includes: 1pc Socket Tester note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.