Resistant polyester 300D versatile backpack trolley with USB charging port (power bank not included) for charging tablet and mobile devices on the go. Which can be used a backpack or trolley. A variety of compartments are handy for convenient storage which include inner padded pocket for laptops up to 15 inches, inner compartment for tablets up to 10 inches, main pocket with double puller, front and side pockets, and trolley mechanism compartment Padded back and adjustable shoulder straps with padding are designed for comfort. Supplied with wheel cover accessory with Velcro fastening for comfort while using as a backpack. Great for leisure or business travel.