Portable design: The mask fan is small size and light weight. Portable mini design, easy to operate anytime 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. adjustable ear loops fan. 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. Wear it with the air outlet facing down, facing the nose and mouth for better effect. Portable Mini Fan: This mini fan is made of durable hard plastic. The fan can be charged via USB. The fan speed can be adjusted in 2 speeds. It can be fully charged for 2 hours. 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, the work indicator lights up white, press to turn on the second gear intermittent wind, and then press to shut down, the work indicator goes out, and the machine stops working. The second gear is intermittent wind-high-power intermittent operation. The wind speed increases but is not continuous, with an interval of 5 seconds. The full power state can maintain about 2H operation. Air Circulation Fan: Soothing circulating wind, Allow the air in the mask to circulate. can be carried indoors and outdoorsthe safety wearable fan suitable.