Dual-use desktop and floor-standing design, compact and easy to move. Powerful performance and a steady output of clean air. Eliminate common indoor air pollutants effectively with layer-by-layer filtration. Certified by the authoritative TÜV Rheinland, Xiaomi Smart Air Purifier 4 Compact is proven to effectively filter out allergens in the air. Filter out allergens such as pollen, dust mites, etc. Filter out allergens such as pet hair, dander, etc. Remotely activate your air purifier by using the Mi Home/Xiaomi Home app, welcoming you home with clean and fresh air. Alexa and Google Assistant voice control features require smart voice devices to function. Related connecting devices are sold separately. With particulate matter sensor configuration, sensitive monitoring of air quality and automatic adjustment of purification speed, you can enjoy clean air at all times. Intuitive indoor air-quality data from four-color indicator light. Adjust your purification settings with the simple touch control buttons, one light touch to fulfil your air-quality needs. In manual mode, you can set the coverage area and customise the speed according to your preference. In Sleep Mode, noise is as low as 20dB* and the display light can be turned off. Have a peaceful night's sleep without late-night disruptions. Power can be as low as 27W, even at the maximum output. Only 0.7kWh are needed for 24 hours of purification. No carbon brush friction, making it quieter and more energy efficient. Combination of two filter technologies: Electrostatic and mechanical filtration. Xiaomi's High Efficiency Filter media can remove 99.97% of airborne particles as small as 0.1 micrometres and traps dust, PM 2.5, pollen, pet dander, smoke and even the smallest microplastics. The filtration rate of Xiaomi's High Efficiency Filter media is 99.97% for fine particles of up to 0.3 microns, and can reach up to 99.99% for particles as small as 0.1 microns.