POWERFUL SUCTION: Stronger suction than the Bissell SurfaceSense Allergen Pet Lift-Off Upright Vacuum 3415. (Based on ASTM F558, measured at the hose.) DUOCLEAN DETECT: The two-brushroll system with four sensors automatically senses hidden dirt, debris, and hair, and the Detect Pro reacts by boosting suction and brushroll speed for maximum performance. EDGE DETECT: Automatically increases suction power when cleaning within 2 inches of an edge or wall. Delivers maximum cleaning performance along edges and corners, and even from under baseboards—no need for extra attachments or a broom and dustpan. FLOOR DETECT: An ultrasonic sensor detects the floor type and the Detect Pro reacts by automatically adapting its suction level and brushroll speed for optimal performance on all surfaces. DIRT DETECT: Detects hidden dirt, debris, and hair embedded deep inside carpets, and devours it by automatically boosting cleaning power—messes can't hide from Dirt Detect. GUARDS AGAINST BAD ODORS: Odor Neutralizer Technology guards against bad odors inside your vacuum for a fresh-smelling home. ANTI-ALLERGEN COMPLETE SEAL: Works with a HEPA filter to trap 99.99% of dust and allergens inside the vacuum, keeping them out of the air you breathe. (Based on ASTM F1977 of particles 0.3 microns or larger. Allergens refers to non-living matter.) The Shark Detect Pro Lift-Away ADV LA802 bagless upright vacuum combines powerful suction and debris cleaning with cutting-edge DuoClean Detect technology. With its network of sensors, it automatically senses hidden dirt, floor types, edges, corners, and even cleaning direction, and reacts by automatically adjusting suction power and brushroll speed to deliver maximum cleaning performance.