１.No dust bag deployment. No filtration. No exhaust emissions. 2.Energy-saving, environmental protection, noise-free, safe and practical convenience, not power. 3.The use of high strength materials to be more durable. 4.Apply to all types of floors, staircases, corners, carpets, need not worry about the risk of injury. 5.Universal crowded 360-degree head rotation sweeping in all directions. 6.Dexterous convenience, respect only 0.9 kilograms, using efficient rechargeable batteries supply power line without any restrictions 7.Thinness designed to be clean and furniture any corner of the room below. Revolutionary as the invention of the floor cleaning materials experts. 8.Brush round of the unique four directions and four rotating brush to remove debris in any direction, saves time and effort, no noise.