Advanced 3-stage filtration system: pre-filter, true HEPA filter and high-efficiency activated carbon filter can capture allergens, pet hair, dander, smoke, odor and large dust particles, and can also remove air as small as 0.3 microns Ultra-quiet operation: filter the air, with the lowest noise, as low as 25dB, creating a quiet and soothing indoor environment to help you deep sleep This desktop air purifier has a negative ion purification function, and the negative ion concentration can reach 8x10PCS/cm UV ultraviolet sterilization destroys the remaining germs in the air and achieves the sterilization and disinfection effect Suitable for small areas such as studios, bedrooms, office desktops, kitchens, pet rooms, etc. Charging voltage/current: DC5.0V/2000mA (20%) Battery capacity: 10000mAh Battery power: 37W Fan power: first gear/1.7W; second gear/2.6W; third gear/3.7W Working flow of fan: first gear/450mA; second gear/710mA; third gear/1000mA (10%) size:16x16x28.5cm Material:ABS colour:Khaki / White Package Contents: 1 * Air purifier 1 * USB cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.