This three-speed speed regulation, copper core motor, small jitter, suitable for literary for play, jade carving and fine grinding and other processes After the non-closed, the battery works for about 3 hours with no load in the first gear After the battery is exhausted, it will be fully charged, and the 5V2A row will be charged for about 2 hours After the battery is fully charged, the first gear of the electric grinder will turn from red to green High-performance accessories for different wood, glass, metal, and other processes Can be used for various creations or handwork such as grinding, cutting, sanding, engraving, polishing, drilling The lower speed is great for polishing your or sanding your pet ' s nails, Manufacturer: Bwuikim