[Refurbished] Viomi S9 /S9 UV Robot VacuumInnovative Technology Keeps You Safe From Health Threats The Viomi S9 UV kills 99. 9% of germs, has an automatic dirt disposal and a 3 in 1 sweeping, vacuuming and mopping. It features a 3L dust bags that are disposable and a full bin reminder on the APP. The robot vacuum has a 2700pA powerful suction and battery that lasts over three hours. It can clean up to 320 square meters in one cleaning task.