7-SPEED DESIGN- Constructed of plastic and metal body, this electric drywall sander is durable for long-term use. Ergonomic handles fit comfortably. Easy to operate with accessible switches. 7 level variable speed: 800-1750 r/min. A pure copper motor provides 850W power. You can try yourself instead of paying someone to do finishing work. HEAVY-DUTY SANDING HEAD- The electric hand sander features a unique brush pad, absorbing dust fully and protecting the wall. The brush segment is detachable to better sand up to edge. Automatically correcting the horizontal deviation, sand smoothly and easily. Sandpaper Diameter: 8.86inch/225mm. TELESCOPE FRAME & FOLDABLE- The wall sander for painting is convenient for sanding the ceiling with an extendable design of the handle, from 1.4m to 1.7m, allowing for different height sanding work. It can be folded easily for storage and transportation, saving space