Features: High accuracy provide quick and accurate detection of voltage level in electrical circuits, ensuring safe and reliable testing. With automatic identification of alternating current/direct current voltages, builts in protections against electric shock, and a compacts designs, this pen is a must having for any electrical task. The B16 voltage tester pen is good for electricians, maintenance personnel, and homeowners who need to perform voltage tests regularly. This tool can be used in various setting, including household circuit repair, appliance installation, and electrical fault diagnosis. With its intuitives designs and reliable performances, the B16 voltage tester pen help you identify potential electrical issue quickly, saving you time and hassle. Specifications: Component:ABS Size:Approx.16x2.8x2.65cm/6.3x1.1x1.04inch You need to bring your own 2xAAA battery Package Includes: 1pcs Digital Measuring Pen note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.