Made of-plastic, it-is solid, and good performance, long service life. Simple , high accuracy, easy operation and sensitive to detect electric current. It can be widely applied in education, laboratory and scientific applications and industrial areas. The parent protective shell-can prevent it from-dust and reduce damage. The reading in the galvanometer is-quite large and obvious, which makes it easy to read and recognize. Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:As Shown Material:Plastic Package Contents: 1 * Galvanometer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.