Features: Portable design: The mask fan is small size and light weight. Portable mini design, easy to operate any for time and anywhere. Effective fixed, Comfortable to wear.Can be used with various masks. Easy to Wear: The fan is easy to wear with a clip. The hanging design is super light and has no sense of wearing. It is suitable for carrying different masks and is a necessity for a new lifestyle. Portable Mini Fan: This mini fan is made of plastic. The fan can be charged via USB. The fan speed can be adjusted in 3 speeds.The fan can help you expel the exhaled air faster, allowing you to breathe more smoothly. Operation: Press the power switch to turn on the first gear (low wind) and second gear (strong wind) , the work indicator lights up, press to turn on the third gear intermittent wind-operation, and then press to shut down, the work indicator goes out, and the machine stops working. Air Circulation Fan: Soothing circulating wind, Allow the air in the mask to circulate. can be carried indoors and outdoors,the safety wearable fan suitable. Specifications: Material: Plastic Color: White, Gray, Blue (optional) Size: About 60x34.5x18mm/ 2.36x1.36x0.71in Battery Capacity: 300mAh Use Time: About 2-4 Hours Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Mask Fan 1x Data Cable 1x Manual