Canvas Usb School Bags for Girls Teenagers Backpack Women Bookbags Black Large Capacity Middle High College Teen Schoolbag

Dear customer, the USB interface of this bag is just a transfer interface from the inside to the outside on the bag;The factory does not have a charging device (power bank). There is a USB link line inside the bag for the connection between the battery and the internal interface, and the external mobile phone charging line interface is linked with the external interface, forming the principle of internal and external connection charging.