1、Multifunctional: This circuit test pen can not only be used for automotive circuit testing, but also as a test light, power test pen, to meet a variety of use needs. 2、Efficient LED Display: This LED pen provides a clear and bright display that is easy to use in dark or poor lighting conditions. 3、Portable: This LED electric pen has a compact and lightweight design, which makes it easy to carry and store for circuit testing at any time. 4、Fast Fault Determination: You can use this circuit test pen can quickly determine the circuit fault, improve the diagnostic efficiency. 5、Durable: This LED electric pen is made of excellent quality plastic and metal materials to ensure that the circuit tester pen responds quickly and stably and has a long service life.