Features:High-quality materials: The smart electricity test pen is made of high-quality materials, which is not easy to break, wear-resistant and durable, and can be used for a long time.Multifunctional design: The socket circuit analyzer is a two-in-one pocket pen-type smart multimeter and power supply polarity detector with stable performance, high reliability, clear readings and overload protection function.DIGITAL DISPLAY: The socket circuit analyzer features a high-quality digital display that greatly enhances the reading experience even in bright or low light conditions.Portable Design: This outlet circuit analyzer is compact and portable. Its exquisite craftsmanship provides high-precision and high-sensitivity functions. The multifunctional designed voltage tester is easy to use.Safe use: It can promptly remind users to adjust socket failures and safety hazards, repair your protection system, and ensure household electricity safety.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: ABS+MetalSize: about 22*5*3cmTest pen tip:voltage ,positive terminal test pointWith Flashlight,LCD DisplayA C Voltage,1.5V/9V battery,on/off/electric field measurementPower polarity indicator lightLeakage switch test button