Large Capacity Size: 46*30*16cm, the large laptop backpack can hold a 15.6" laptop, smartphone, wallet, power bank, water bottle, notebooks, folding umbrella, clothes, etc. All you need for business/school/trip can be stored in just one bag.Anti-theft Designs & SafeTHEFT PROOF COMBINATION LOCK,protects wallet and other items inside from thief and offers a private space.USB Port Design This USB backpack offers a more convenient way to charge your phone while walking. Please note that this backpack does not power itself and USB charging port only provides easy access to calculate, headphone jack: you can listen to your favourite music on the go hands-free. You can put your own power bank in the backpack and conveniently charge your phone outside with the long charging cable.Comfy and Practical Nano cooling material, well padded breathable mesh, and curve widen design on the back and shoulder strap, greatly release the pressure on your back and shoulders. With multi-fuctional pockets, the laptop backpack is a good partner for long trips.