Product Type: Backpack
Material: Polyester
Closure Type: Zipper
Size：26cm*43cm*11cm (16 inch)
Color：Black/Gray/Purple
Note:
There is no mobile power comes with the backpack inside.
If you want to use External USB Charge Function, you have to do as follows:
1.Buy a mobile power
2.Connect your mobile power with the USB interface inside the backpack
3.Connect your phone with the USB interface outside the backpack
4.Charging begins.