The Shark® POWERDETECT™ upright vacuum combines the most powerful suction with ultra-powerful hair pick up and cutting-edge DuoClean Detect™ Technology for faster, smarter, and better cleaning. It features a network of proprietary Intelli-Sense sensors that do the work for you, automatically sensing and reacting to hidden dirt, floor types, edges, corners, EVEN which direction the vacuum to grip and capture more dirt, debris and hair than original DuoClean nozzle.