Features: 21V lithium battery motor 775 type motor optical 5MM lithium battery. Report Item for angle grinders, hair dryers, and grinding machines. Specifications: Product name: Lithium Battery Motor Suitable for: angle grinders, hair dryers, and grinding machines Note: Installation guide not included, we strongly recommend you professional installation. 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 Color: Silver Material: Metal Package Contents: 1 x Lithium Battery Motor 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.