This test pen is an indispensable tool for your family's daily circuit inspection or electrician work. It has a portable design and a variety of practical functions, if you need it, come and have a try, it will not let you down. Features: Portable size and easy to carry, you can put it into your bags to storage it. Wide applications: This tool suitable for detecting12-250v AC and direct current current and simply detecting 0 line, phase line and breakpoint of ac current, as well as non-live conductor and on-off. With LED flashlight function, you can turn on the flashlight in time when the light is weak or when you use it at night, so that you can use it normally in a dark environment. Adopt LED digital display for you to read the value more clear at a glance, give you a better using experience. Circuit on-off test: Press the "inductive breakpoint test" button, thecharged symbo is the phase line, if there is a Breakpoint in the live circuit, move the test pen, thepoint where the charged symbols disappears is the break point. Hide battery compartment design, which is more convenient for you to change the battery, you just need to pushing the battery compartment to achieve changing. Specifications: Material: chrome vanadium alloy steel+ABS Color: red, yellow (optional) Voltage: 12-250V Power: 3 * 1.5V AG10 Battery (NOT INCLUDED) Item size: 143 * 36 * 18.7mm / 5.6 * 1.4 * 0.7in Package size: 145 * 38 * 20mm / 5.7 * 1.5 * 0.8in Package weight: 30g / 1.1ounce Packing list: 1 * Test Pen