Rechargeable: This summer cooler is designed with a built-in 1200mAh battery, enough to meet your after fully . Adjustable: This kind of air fan has 3 speeds for adjusting, suitable for summer and hot weather. Silent: This personal cooling device works with a low noise because it is brushless, suitable for sleeping, working, studying, etc Portable: This cooling fan is easy to and carry, you can hold it in hand or put it on desk without taking up so much space. Use in multiple scenes, refreshing and unrestrained, anytime, anywhere, enjoy cool and refreshing Product Name: Handheld Fan Use time: about 2.5H-3.5H Battery capacity: 1200mAh Charging voltage: DC 5V Rated power: 3.5W Product features: Portable for students, can be taken with the dormitory, rechargeable USB mini handheld fan Built-in 1200mAh battery, small and portable, convenient for outdoor travel Name: Handheld Fan Type: Fan Type: Mini Handheld Fan Wind Type: Natural Wind Power Source: Battery Type:Office Fan Type: Fan Rechargeable Type: Air Cooling Fan Type:Air Conditioning Fan Mini Type:Usb Fan Portable Features: Bladeless Fan Features: Quiet Fan Usage: Summer color:Blue Material:ABS size:90 x 48 x 189mm Package Contents: 1 x handheld fan 1 x charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.