The precise light beam of the Dyson V15™ makes invisible dust on hard floors visible. A piezoelectric sensor continuously calculates the number and size of the vacuumed dust particles. This allows the Dyson V15™ to automatically increase suction power as needed. The LCD display shows the quantity and size of the vacuumed dust particles in real time. Motorized brush head with hair guard. Cleans thoroughly on all floor types. Nylon bristles remove dirt from carpets. Black carbon fiber filaments are anti-static and pick up dust from hard floors. Automatic deep cleaning of carpets. In Auto mode, Dyson DLS™ technology in the motorized brush head monitors the resistance at the brush bar 360 times per second, so the suction power is automatically adjusted to different floor types.