Neon test pen, also known as a pencil, is used to check whether wires, electrical appliances, and metal enclosures of electrical equipment are charged. Neon tube test pen is one of the most commonly used test pens. During the test, whether the test object is charged is determined by whether the neon tube inside is glowing.It can be used to detect voltages from 60 to 550V. In this range, the higher the voltage is, the brighter the neon tube will be. Below 60V, the neon tube will not be bright.

Digital explicit test pen also known as inductive test pen, it can not only test whether the object is charged, but also show the approximate voltage range, in addition, some digital explicit test pen can test the insulation wire break position.

The test pen is marked with 12 ~ 240vAC.DC, indicating that the test pen can measure AC or DC voltage in the range of 12 ~ 240V. The two keys on the test pen are made of metal materials, and the hand should hold the key to form a current loop during measurement.