R uhens Air Purifier | FEATURES BREATHE EASY, HEALTHY LIVING! Cluster Ionizer Air Quality System Mood Lighting Sensor Touch Screen Filter Replacement System (Only For Hepa Filter) Timer (2,4 or 8 hours) Advanced technology for air cleaning RUHENS air purifier makes a pleasant air by emitting the ion cluster which effectively removes germs, microorganism like staphylococcus aureus into the air. The 4-stage of LED lamp to show the air pollution level A sensor detects the indoor air pollution level and display its degree of air pollution in 4 kinds of colors. Smart Sleep Mode The airflow speed and light will be optimized automatically during a sleep mode for a pleasant rest. Premier Design A sleek design will be matched with any interior, and the beautiful color combination of white & blue will make the interior gorgeous. Removal of the ultrafine particle (PM1.0) Not only the fine dust invisible but also the ultrafine particle that is harmful to the human body can be removed. Clean 4-Stage Filtration System Eliminate harmful viruses like dust, bacteria and mildews through the 4-stage filtration system (Pre-filter, deodorization filter, antibacterial filter and HEPA filter).