21 Battery Life and Short Charging Time:This hand held fan runs for 21 hours on setting 1 and 14 hours on setting 2 after 3 hour full charging, so you can enjoy the fan whole day during outdoor/inside events .^Foldable and Portable: The size of this pocket fan is only 113.5*36*37.5CM, weight20g. It can be easily put it in your pocket or purse when you are out to Disney, camping and so on. The foldable design makes it easy to be carried and stored.^USB Operated Pocket Fan and Touchable Blade: This personal fan can be charged by computer, laptop, portable charger and USB power adapter. With special soft TPE material, the blades are very safe. If you accidentally touch the rotating blades, the soft blades will automatically stop and keep you safe.^Backup Power Bank:5V/1A USB output port makes the mini fan a power bank(1500mAh) in emergency, supplying power for mobile phone, MP3, or iPod, etc. ^Low Noise:The usb fan is built-in with no frame, the noise is down to 45db.