-You can connect directly to your computer.- It comes with a rechargeable battery and flashlight.- The fan has 3 modes and runs pretty quiet that you barely know it's there when on.- It also comes with hook, making it portable.-  It charges via USB cord.- Extremely compact and a pleasure to use all year round, no matter the season.-  So powerful more than you think.-  You can plug into a usb to charge other usb devices.-  Very simple to use.- Battery is replaceable.- Input: 100 to 240V AC  - Output: 5V 1A DC Package Includes:  ● 1 Mini USB Fan  ● 1 2600mAh Rechargeable Batteries  ● 1 Micro USB Cable  ● 1 Carabiner  ● 1 User Manual