AFTER SALES SERVICE GUARANTEE: We solemnly promise that within one year of purchasing and receiving this product, if any quality defects occur during normal use (not due to improper use or human damage), you only need to take a photo of the defective product and contact us. We will reply with a solution to the problem within 24 hours, or send you a new identical product for free to replace the defective product(Note: Products purchased and used for more than one year do not enjoy this right) | LOTS OF STORAGE SPACE&POCKETS: One separate laptop compartment hold 16.3 Inch Laptop as well as 15.6 Inch,14 Inch and 13 Inch Macbook/Laptop. One spacious packing compartment roomy for daily necessities,tech electronics accessories. Front compartment with many pockets, pen pockets and key fob hook, make your items organized and easier to find | COMFORTABLE AND BREATHABLE MATERIAL: The adjustable shoulder straps and back are equipped with a comfortable and breathable mesh design, comfortable and breathable foam cushion backrest design, with good heat dissipation, provides maximum back support for your back. The foam filled top handle is comfortable long-lasting use. Equipped with two "S" shaped curve filled shoulder straps, which provide strength enhancement. It is suitable for travel, shopping, work and other outdoor activities | USB PORT AND PASSWORD LOCK DESIGN: Equipped with a built-in USB charger and charging cable, this USB backpack provides a more convenient way for you to charge your phone while walking. Please note that this backpack cannot be powered by itself. The USB charging port only provides a convenient charging method, and the unique password lock design provides you with security protection | FUNCTIONAL&SAFE: A luggage strap allows travel laptop bag fit on luggage/suitcase, slide over the luggage upright handle tube for easier carrying. Tighten the breast strap can stabilized the center of the gravity of the backpack. Internal shockproof belt for fastening your laptop and iPad, preventing them from sliding and bumping(This item is not intended for use by people 12 years old and under) | This item is not intended for use by people 12 years old and under