Xiaomi Viomi Alpha S9 UV Robot Vacuum S9 with UV-Automatic Dirt Disposal - Black UV sterilization, kills 99.9% of germs Effectively kills 5 kinds of floor bacteria. Ultraviolet rays are effective to kill bacteria, keeping you away from health threats. UV Ultraviolet sterilization technology is more effective than manual cleaning Exhausted from getting rid of germs on your floor? Don't worry? Viomi alpha UVgot you covered! UV leak-proof design, thoughtful protection of family health Ultraaviolet leak-proof design, UV lamp auto off during standby/off the groud, putting safty first. Physical sterilization, No residue Sterilization without hurting your skin, protecting the family's health. Full-bin reminder, real-time control of dust bin status Equipped with auto dirt disposal system 2.0, completey frees your hands. 3-in-1, Sweeping, vacuuming and mopping, Eliminating everthing dirty at one go Vacuuming first, then sweeping and mopping, saying goodbye to redundant work.