After fully charged, the hand held fan can last for 1-4 hours for its 900mah battery capacity. This is also a Type-C fan compatible with universal Type-C devices port, you can charge it by power bank, PC/laptop, phone charger etc. The portable fan is designed in suitable length and width that is very easy to hold, you can put it into pocket or bag, it's suitable for outdoor, sport, travel with its palm-size. With the removable base, you can use it as desk fan in your office, make up, home or carry it around to solve the hot stuff on the road. Meet your cool needs throughout the day. Made from high quality ABS materials, very safe to use for both kids and adults. It is easy to operate with only one button, press the button to turn on/off the fan, press repeatedly to adjust the wind speed