This is the robotic vacuum that uses UV light to eliminate up to 99.9% of germs and viruses from floors. A UV lamp under the unit destroys germs, bacteria, and allergens while the robotic vacuum autonomously navigates and cleans floors. When its sensors detect an obstacle, the robotic vacuum automatically slows down and changes course to avoid walls, furniture, and stairs. Instead of traditional roller brushes, the vacuum uses high-power suction to remove deeply imbedded dirt and hair from carpets or dust on hardwood floor planks. Integrated sensors detect areas of high dirt concentration, signaling to the vacuum to spend more time on these areas. Two filters (one HEPA that captures dust and allergens as small as 0.3 microns) ensure clean air is recycled into your home. The vacuum can be programmed to clean at specific times, seven days per week, and it automatically returns to its charging base when the battery runs low. The included barrier projects an infrared beam to confine the vacuum to a specific area and the remote control enables easy spot cleaning. Recharges in 3 hours. 13 1/2" Diam. x 3 2/3" H. (7 lbs.)