specifically a model designed for sanding walls and ceilings, likely featuring an extendable pole for reaching higher areas. 
Product:
Vido Electric Drywall Sander (similar to Varan Motors L225-A Giraffenarmschleifer). 
Purpose:
Primarily used for sanding plasterboard, wallboard, gypsum board, and other plastered surfaces on walls and ceilings to achieve a smooth finish before painting or further plastering. 
Key Features:
Often includes a long, extendable handle, a pivoting or flexible sanding head, and a dust collection system for cleaner operation.