Roger Little –the quiet, efficient air purifier for rooms of up to 355 square feet–filters pollutants and gases, ensuring clean and healthy indoor air. He continuously measures the quality of the air and immediately detects gaseous pollutants such as unpleasant smells or volatile organic compounds (VOCs). If the air quality deteriorates, the air quality indicator changes color. If the intelligent auto mode is also activated, mobile room air purifier Roger little will adjust his cleaning performance automatically to meet current needs. The more polluted the air, the higher his chosen level of performance will be. The elegant air purifier is equipped with a washable, textile pre-filter which removes coarse dust particles and pollutants from the air and has an integrated Sanitized® hygiene function. At the heart of the air purifier is the Dual Filter™–a combination of an H12 HEPA filter and an activated carbon filter. The highly efficient HEPA filter removes pollutants such as fine dust, pollen, viruses and bacteria* from the air while the activated carbon filter adsorbs gases present in the air. Thanks to his timer and LED that can be switched off completely, with Roger little a good night’s sleep is guaranteed!Roger Little is suitable for rooms of up to 355 square feetand changes the air 3 times per hour. For heavily contaminated room air and for allergy sufferers, Roger Little is recommended for rooms of up to 215 square feet–with an air change rate of 5 times per hour.Roger Little shows the quality of the room air. He continuously measures the quality of the air with his sensors. The air quality indicator lets you know if air quality deteriorates by changing its color (blue = good, orange = medium, red = poor).The textile preliminary filter removes coarse dust particles and pollutants from the air. By doing this, it protects the Dual Filter™and prolongs its service life. The integrated Sanitized®** hygiene function protects the preliminary filter against microbial growth. The textile pre-filter can be washed on a cold wash delicate cycle. The antimicrobial protection is guaranteed for at least 20 washes. Based on normal use, we recommend washing the pre-filters every 3 months while allergy sufferers are recommended to wash them once a month.