1,DUAL FUNCTION TESTING: This unit features two popular testers in one. On one end, a non contact voltage detector, and on the other end, a GFCI socket tester. These functions provide comprehensive testing capabilities for electrical circuits. 2,CIRCUIT INDICATION: The non contact voltage detector has a sensitivity range of AC and 50‑60Hz, accompanied by a buzzing sound indicator. This allows for quick and convenient detection of live voltage without the need for direct contact. 3,INDICATOR LIGHTS: The socket tester is equipped with three indicator lights, including a low battery warning, to ensure accurate and reliable testing. It can detect incorrect socket connections and display the condition of the socket, providing clear visual feedback. 4,ERGONOMIC DESIGN: This tester is built with a high impact ABS housing and an ergonomic handle design, ensuring durability and a comfortable grip. The ergonomic design reduces user fatigue during testing, making it easy to handle for extended periods. 5,EASY READABILITY: With a built in flashlight, this socket tester is suitable for use in dark environments, allowing for quick and accurate detection of issues such as incorrect wiring, missing ground wires, reverse polarity, and more. Its versatility and ease of use make it ideal for various applications, such as office, home, and factory settings, including kitchen or bathroom electrical reconstructions and project inspections, ensuring electrical safety. Item Type: Socket Tester Material: ABS Flashlight Function: Supported Sound Indicator: Supported Display: LCD Display Battery: 1 x AAA Alkaline Battery (Battery Not Included) 1 x Tester Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store