Quiet operation, comfortable experience Low noise motor: Adopting DC brushless motor or silent motor technology, the running noise is as low as 25-35dB, which will not disturb rest even when used at night. Sleep mode: Some models are equipped with sleep mode to further reduce noise and ensure a quiet and comfortable sleeping environment. Highly efficient purification, fresh air HEPA filter technology: effectively captures tiny particles in the air, including PM2.5, bacteria, viruses, etc., reduces allergens, and has a purification efficiency of over 98%. Activated carbon adsorption: some models are equipped with an activated carbon layer to filter smoke particles and odours and improve air quality. Intelligent Sensor, Convenient Operation Air quality monitoring system: Built-in air quality sensor, real-time display of air quality index at a glance. Touch/Remote Control Operation: Equipped with touch panel or remote control, supporting one-key switch, wind speed adjustment, timer shutdown and other functions, easy and fast operation. APP interconnection: Some models support mobile phone APP interconnection to achieve remote control and intelligent management. Portable design, flexible use Compact body: Some models adopt compact body design, easy to carry and place, whether in the office or at home, can be easily used. Adjustable bracket/angle: Some models support bracket installation or angle adjustment to meet the needs of different heights and directions.