1DUAL FUNCTION TESTING: This device features two essential testers in one unit. One end houses a non-contact voltage detector, while the other end includes a GFCI socket tester. These functions offer extensive testing capabilities for electrical circuits. 2CIRCUIT INDICATION: The non-contact voltage detector has a sensitivity range of 12300V AC and 5060Hz, accompanied by a buzzing sound indicator. This facilitates quick and convenient detection of live voltage without any direct contact required. 3INDICATOR LIGHTS: The socket tester comes with three indicator lights, including a low battery warning, ensuring accurate and reliable testing. It can identify incorrect socket connections and display the status of the socket, providing clear visual feedback. 4ERGONOMIC DESIGN: This tester is constructed with high-impact ABS housing and an ergonomic handle, ensuring both durability and comfort. The ergonomic design minimizes user fatigue during testing, making it easy to use for extended periods. 5EASY READABILITY: Featuring a built-in flashlight, this socket tester is perfect for dark environments, enabling quick and accurate identification of issues such as incorrect wiring, missing ground wires, reverse polarity, and more. Its versatility and ease of use make it suitable for various applications, including office, home, and factory settings, such as kitchen or bathroom electrical renovations and project inspections, ensuring electrical safety.