Size: 11.4 x 6.3 x 18.1inch/29 x 16 x 46CM Backpack with laptop protection compartment, can hold 15.6in laptop. The side of the Twice backpack is equipped with USB and audio cable ports, we provide USB cable and audio cable. The body joint is neatly reinforced, fine workmanship, no wire drop phenomenon, good quality, can be used at will. Quality details: 1, comfortable portable 2, leisure double pull head 3, adjustable shoulder strap 4.Breathable shoulder strap design. Backpack consists of a main bag, 3 zippered front pockets and 2 side pockets.The main pocket has a special laptop head, two pockets for storing files, and two pencil pockets.These pockets keep your stuff in order so you can easily find what you need.