The DC 31 vacuum cleaner from Dyson is a special vacuum cleaner. The vacuum cleaner has a rechargeable battery. This means: The vacuum cleaner can also be used without a cable. The vacuum cleaner uses a special kind of technology. The technology is called: Root Cyclone Technology. This is a technical term and means: • The vacuum cleaner works very well. • The vacuum cleaner lasts a long time.

Dyson has a patent for this technology. This means: The invention is special and nobody else is allowed to make it. The motor of the DC 31 vacuum cleaner is also a special motor.