4-16hrs Working TimeThe portable fan with built-in 2000mAh battery keeps for 4-16h working, convenient for outdoors. The plug-and-play USB office fan can be adapted to power bank, laptop, car adapter and so on.The small fan displays red light when charging, and turns green light when fully charged.(It is ok to use the USB fan while charging). Ultra QuietThe quiet fan blades are made of high-quality materials, so the sound of desk fan (about 30-50dB) is quieter than other ordinary airflow fans, which is suitable for you work, study and rest.Place a soft cloth or a few sheets napkins on the bottom of the desk fan for quieter operation. 3-Speed Strong WindThe PC fan can be adjusted easily by pressing the button; Speed1-natural wind (2.2m/s-1600rpm) is good for indoor air circulation; Speed2-cool wind(3.2m/s-2200rpm); Speed3-strong wind (4.0m/s-2600rpm) blows away the summer heat. The battery fan can meets your different occasions. Portable & Easy CleanThe compact desktop fan is small in size(14.5*3*18.5cm/5.7*1.18*3.1in)and light in weight(255g/0.56lb), making it easy to carry around and store. The rechargeable personal fan is very suitable for office, library, bedroom, school, car, even for trips and so on. And the easy-to-disassemble design of the travel fan is convenient for you to clean the dust on it at any time. 180 Adjustable FanThis 180 Adjustable electric table fan allows you can adjust the most comfortable angle. The classic appearance is like a small piece of art, which not only provides you with coolness, but also decorates your desktop. Warm Care for WomenDue to the decline of estrogen, menopausal women are prone to symptoms of hot flashes and night sweats. Not only do you need to eat more foods containing calcium and vitamin E in diet, but should also strengthen outdoor exercise. This foldable travel fan will accompany you through this period and effectively improve the symptoms of hot flashes in menopause. The electric silent fan is the most intimate summer gift for you or your wife and mother.