Easy to carry. This is the "CleAir Win" mini fan that can be used for clearing air purifier, and "CleAir Win" which allows you to disinfection air conditioning while the window is closed, making it easy to use for crowded trains, schools, etc. In the hot season, you dont want to wear a mask, but you dont have to worry about removing the mask. We want to eliminate any anxiety in your daily life. With that thought, we created a "wearing air purifier". This mini pendant fan is easy to use for a variety of everyday occasions. Adjustable strap allows you to hang it from your neck. Clip on allows for double and triple grip filters and 0.3? Allows you to send 50-80% of particles to your face. Easy to operate. Simply lift the intake clip, clip the mini filter and press the switch. The blue light will light up when the fan is turned on. Its simple and easy to understand, so it can be used by the whole family, from the elderly to the youngest children. Comes with 3 adjustable levels. Comes with a USB charging cable, so you can charge it with a mobile battery even when you are out on the go from a computer or outlet. (Note: Do not use this product while charging the device) "Life is better than not." Would you like to have a bit of peace of mind from a professional point of view of the space. If you would like an additional mini filter, you can purchase it separately (part number: cra08 mini filter). The mini filter is cut by hand, so there may be slight size differences and markings. Due to the nature of the product, there may be some creases, but this is not a quality problem. Filter replacement estimate: Approximately 1 week based on 4 hours per day, and 3 days depending on usage conditions. It comes with a safety device that can be moved without pulling force, but please be careful when using. When using by children under 12 years of age, we ask that you have sufficient instructions on how to use it by parents and the person who is in the manager.