Quieter for undisturbed sleepAir filter apartment Low speed with the noise level for undisturbed sleep and rest. Air purifier mold In this mode, the air purifier works with a low noise level of 10 dB and is therefore even quieter than a whisper, creating a quiet and comfortable environment for sleeping, working or exercising at home. 3 modes speed andamp strong cleaningHepa air purifier 3 fan speeds (low, medium, high, ) are conveniently adjusted according to your different requirements and air quality in the house. If you want to change the air quickly or use it in a new house, a room that has not been used for a long time, you can choose the strong speed mode for daily use you can set the normal speed mode if you want a quiet environment, you can choose the low mode. Small air purifier air filterThe portable dust mite air purifier is an intelligent air purifier, a built-in 4000 mAh battery and a USB cable with Type-C interface for charging. This product uses an efficient activated carbon filter (please it is recommended to replace the filter element every 6 months) Size: 160x160x190mm, thanks to the compact size, the air purifier fits easily into any place in your home, portable air purifier suitable for small areas and rooms such as studios, bedrooms, offices, kitchens, cars, pet rooms. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.