Features: 1. The speed of this portable battery fan can be adjusted between low, medium and high according to your needs. It is decent and quiet, ensuring a quiet flow of air that is adequate for personal use. 2. The small electric fan has a strong and steady wind to keep you cool. It does not disturb your rest and work. 3. The USB electric fan has stable performance and long service life. Convenient for outdoor activities. Can also be used indoors. Perfect for use in offices, homes, dormitories, etc. 4. USB electric fan is compact size and weight is designed for children. Lanyard design can free your hands, perfect for travel. 5. This is definitely a perfect gift for your family, friends, or your loved ones. If there is any problem or accident, please feel free to . Specifications: Working time: 1- 1.5 hours Charging time: 2-3 hours Material: plastic Battery: 3.7V Battery capacity: 500mah Discharge power: 1.5- 2.5W Discharge voltage: 5V/.05A Speed mode: three speed adjustment Product size: 14.6* 6.5cm Package List: 1 x Mini Fan