Description: It is easy to read this electrical pen and it can work in dark environment because this electrical pen uses LCD backlight digital display and flashlight lighting. This electrical pen uses contact-free induction, which can quickly measure breakpoint, firewire, null line, AC electricity, battery electric quantity, battery self-test and it is multifunctional. It is constructed of plastic and metal material. There are three sizes for you to choose from. This electrical pen is suitable foe home and electrician. Item Name: Electric Pen Material: Plastic, Metal Style: A: Induction Electric Pen, B: Multifunctional Electric Pen, C: Digital Display Electric Pen, D: Waterproof Electric Pen Features: Portable, Contact-free, With Auxiliary Lighting Size Details: A/B, Length: 14.2cm/5.59"(Approx.) C, Length: 14.7cm/5.79"(Approx.) D, Length: 14cm/5.51"(Approx.) Notes: 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. Package Includes: 1 x Electric Pen 2 x Button Batteries