Name: Rechargeable Miniature Electric Grinder DIY Engraving Tool Speed Adjustable Small Electric Grinder Model: E108-60 Color: Silver Battery voltage: 3.6V Battery: 300MA No-load speed: 5000-10000-18000 Chuck size: 2.35MM Chuck depth: 25MM Use time: The third gear can run for more than 1 hour with no load. If you need to use it for a long time, you can use it while charging. Charging: It can be fully charged to 80% in 30 minutes, and can be fully charged in 60 minutes. Stand-alone weight: about 60G Suggestion: 1. This type of electric grinder has low power, not a profeional electric grinder, and is suitable for the field of small precision engraving and grinding. 2. Do not place the electric grinder in a high temperature place above 40 degrees. 3. When the electric grinder leaves the factory, the power is generally about 50%, and it needs to be fully charged before the first use. 4. The charging port adopts USB-type C socket 5. Do not cover items when charging to ensure good heat diipation. 6. Power display: 1 light=30% 2 lights=31%~70% 3 lights=71%~100% 7. After the point is fully charged, the electric grinder will automatically turn off the power and turn off the lights. 8. When not in use, it needs to be fully charged and placed, and charged once every six months. Notice:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement. Notice:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement.