Description: 【Portable Design】: This compact and lightweight 2 in 1 socket circuit analyzer features a pen type design, making it easy to carry and convenient for on the go use 【LCD Display】: Equipped with an LCD screen and LED light, this smart sensing test pen provides clear readings in various environments, ensuring accurate measurements every time 【Versatile Functionality】: Ideal for detecting socket polarity, leakage trip detection, voltage sensing, and wire conduction testing, offering a wide range of applications for both professional and home use 【Smart Electrical Tester】: Simplify your measurement tasks effortlessly, quickly, and accurately with our smart auto recognition feature 【User Friendly Operation】: The Voltage Tester Pen device operates efficiently within a working environment of 0~40°C with relative humidity below 80%, ensuring reliable performance under standard conditions Specification: Material: ABS, Metal Color: Red   Size Chart: 21.2cmx4.2cmx3.5cm/8.35inchx1.65inchx1.38inch Voltage: 110V Package Includes: 1 Non Contact Voltage Tester (US Plug) Note: Please allow slightly errors 1-2cm differences due to manual measurement.