Specifications: The wind speed of this cooling fan is adjustable in three gears. It has a built-in rechargeable battery for long-time use. This portable cooling fan is a good companion for tourism and outdoor sports. Item Name: Mini Cooling Fan Material: ABS Fan Blade: 7 Blades (Large Wind) Wind Speed: Adjustable in Three Gears (First Gear: Gentle Wind; Second Gear: Natural Wind; Third Gear: Strong Wind) Output Power: 3W Input Current: DC 0.5-1A Output Voltage: DC 3-5V Input Voltage: DC 3.7V Battery Capacity: 400mAh (Included) Power Supply: USB Charging Features: Rechargeable, Portable, Handheld Fan Size: 17.9cm x 7.5cm x 4.8cm/7.05" x 2.95" x 1.89" (Approx.) Notes: The fan must not be used while charging. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Mini Cooling Fan 1 x Charging Cable 1 x Base