【Eliminate Stuffiness】: This small summer fan alleviates the discomfort caused by stuffiness and breathlessness, making it perfect for preventing heatstroke in the summer. Simply clip it onto your everyday non-woven fabric to circulate air inside, quickly expelling heat and reducing the unpleasantness of stuffiness and breathlessness. 【3-Level Wind Speed Adjustment】: With a single button, you can adjust the wind speed in 3 levels to your preference. Use it freely according to the situation. Level 1: Gentle wind, Level 2: Soft wind, Level 3: Intermittent mode, gentle wind. 【USB Rechargeable】: Equipped with a Type-c rechargeable large-capacity lithium battery. Charging time: Approximately 40 minutes. Charging: Red light on, Fully charged: Light off. It can be charged with the included USB cable, making it rechargeable and usable anywhere. You can charge it from the USB port of your computer at home or in the office. 【Quiet Design】: The fan clip-on type operates at -35dB, so it's quiet and can be used without worrying about the surroundings, even in quiet places, minimizing noise. It won't interfere with your life or work, and can be used in various situations such as commuting, cycling, and during meetings. 【Convenient Features】: This portable fan is compatible with various types of non-woven fabrics - urethane/cloth/non-woven, and can be used by both men and women. Easy to carry and attach, just clip it onto the mask you always use. It has a raised surface on the clamping area to prevent it from falling off! Cordless design, easily fits in your bag! Easy to carry around.