Features Style: green wire/small DC electric penMaintenance of low-voltage circuits such as automobiles, motorcycles, and excavators. 6V/12V/24V, DC, AC, pulse, multi-function three lights in one, easy to replace. The lamp can be plugged and unplugged, and can realize a variety of functional detection. It adopts the small lamp socket bulb commonly used in cars, which is more convenient to replace. The probe is made of pure steel, which is hard and durable without bending. The main and auxiliary probes are inserted into the probe to be tested at the same time. The back light of the pen probe is 3W, which can be replaced alternately. Specifications: Material:Plastic + Copper Wire Size:Approx.115x15x11cm/45.28x5.91x4.33inches Color:As Picture Shown Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Package Includes: 1x Test Pen