Features:1. The mini air purifier can be charged by USB and can last for 4-8 hours when fully charged. It is an air purifier that can be worn on your face with good purifying effect.2. Mini air purifier, strong ventilation: three-speed adjustable wind speed, unique built-in fan ventilation design, good air permeability, efficient exhaust, and maintain air circulation and freshness.3. Perfect protection widely used: The dust removal fan separates 99% of the dust particles, which is suitable for dust proof, automobile exhaust, and PM2.5 protection. It is suitable for outdoor activities such as cycling, mountain climbing and skiing.4. Replaceable filter element: Only one filter element needs to be replaced each time the purifier, and the replacement time of the filter element varies according to different environments.5. Convenient to carry: The purifier is lightweight and small, easy to carry. You can usually put the purifier in your pocket or bag. Notice:1.Actual color may be slightly different from the image due to different monitor and light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Power supply wind speed: USB chargingControl method: push-buttonColour: Black