[ EXPANDABLE DESIGN ] : Dimensions: 17.7 x 12.6 x 7.1 – 10.1 inches. Expandable backpack has smooth zippers on the side of the main compartment. Once pull on the zipper, the bag will offer a large capacity up to 38 L for you to store more stuff[ UPGRADE USB-C ] : FENRUIEN smart backpack gives you a provision to connect your power bank and gives you access to it via USB port outside on the backpack (Power bank is not included)[ TSA…