Dimensions: 17. 7 x 12. 6 x 7. 9 inch. The laptop backpack built in separated laptop compartment, which can hold 15. 6 inch, 15 inch, 14 inch and 13 inch MacBook & laptop. Usb charging port: outside built in USB charger port and inside built in charging cable, This smart design provides a more convenient way to charge your phone, you don't need to hold the power bank with your hands anymore, just put it into backpack and connect with charging cable, then you can charge your phone easily while walking. (Power bank not include) High quality material: Made of durable water resistant oxford fabric with sbs double zippers. Ensure long-lasting secure and comfortable usage as laptop backpack, Book bag for business, travel and college. Comfortable & convenient: multi-layer breathable elastic sponge cushion back and adjustable shoulder straps provide the maximum back support