Self-Righting Technology - Dyson BIGBALLMULTI Big Ball canister vacuums are monostatic: they have a single stable resting point. Dyson engineers made this possible using a complex configuration of the vacuums components. By assembling them in a spherical array, with the heaviest components near the floor, we created a curved body with a low center of gravity. This means that whenever the vacuum is displaced from its resting position, gravitational force will automatically return it. Or more simply, when its knocked over, it gets back up. Hygienically Ejects the Dirt - Dyson Big Ball canister vacuums feature a new bin emptying mechanism. You can hygienically drive out trapped dust and debris with just the push of a button. Theres no need to touch the dirt. Articulated Handle for Easy, Versatile Cleaning - The wands handle rotates in three directions, allowing 360 articulation for greater control all around the home, from floors to furniture and even high corners. Includes a 5-year warranty covering parts and labor.