9.5 AMP POWERFUL MOTOR Our drywall tools is equipped with a 9.5 AMP pure copper motor which enable you to adjust the variable speed from 600 to 2600 RPM according to your different needs to obtain different sanding effects. This lijadora para drywall is suitable for different grinding scenes, such as wall sanding, ceiling sanding, floor sanding, etc. AUTO DUST REMOVAL SYSTEM The sander tool has a built-in vacuum system and high-density brushes enable it achieve a strong dust vacuum efficiency which up to 95%-99% if operated properly. This dustless drywall sander help you create a fresh and clean working environment and minimizes your cleanup work. The higher the rotate speed, the stronger the suction. You can also connect this electric drywall sander to a household vacuum cleaner via the included connector to achieve the most ideal vacuuming effect.