External USB with built-in charging cable offers a convenient charging of your electronic device anywhere.
Reflector design, more conspicuous and safety when Walking or cycling in the dark.
Apply anti-theft design technology, the zipper of this bag is fully hidden in the back, great for travel,work and school.
Padded shoulder straps and back padding offer extra back support and comfort.
Size: approx. 48 x 26 x 10cm/18.90 * 10.24 * 3.94in, large capacity, and with a variety of function pockets,perfect for outdoor travelling.
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.