Backpack,17 inch Laptop Bag 41 L Expandable and 3 in 1 。? HOT ITEM ? ?【Dimensions】This travel laptop backpack fits up to 17.3\" laptop. Exterior dimensions (L*W*H):19.5x 12.5 x 5.3inch. Simple and practical, lightweight and comfortable，very suitable for travel，and it also work well as businessbackpack, work backpack, computer bag, hiking bag, daily bag. ?【Anti-theft Design】 This travel backpack apply anti-theft design techology. Includes a theft proof combination lock& metal zippers, no thief can open your backpack easily .Provide security for your journey. ?【External USB Charger Port & Headphone Jack】 Business work backpack with charging cable is convenient to charge smart phone/tablet/other devices. Headphone Jack: you can listen to your favorite music when you are carring the travel backpack on road. Note: Not Include Power Bank. ?【Comfortable Back Support System】Ergonomic design of S-shape padded shoulder straps and padding back design, made from high elastic and breathable sponge and fabric, equipment with adjustable chest buckle and ring type adjustable hasp, adjust the strap length freely , reduce the burden of weight, protect the back and shoulder effectively, more comfortable for your life.