??[NEW SERIES OF FINGERPRINT BACKPACKS]using high-tech fingerprint sensor,uses the latest capacitive fingerprint recognition technology, you can set 10 sets of fingerprints, unlock in 1 second, safely guard your items to prevent cloning, more secure, anti-theft. ??[EXTERNAL USB CHARGING PORT]Classic USB backpack provides an inside USB that plugs into the portable charger. Your electronic device can be charged by connecting to the outside USB port, it is a easy convenient charge way when you are walking and riding. ??[DURABLE REINFORCED MATERIAL]Choose high quality Polyester + Oxford cloth,High-density fabric which is waterproof, anti-scratch and friction resisting, combined with soft and comfortable Polyester Lining material .Combine with high permeability padded wide shoulder straps with decreasing pressure of shoulder and neck when you carry it for a long time,complete lining, load-bearing but lightweight. ??[MULTIFUNCTIONAL STRUCTURE]Large capacity, multi-layer design, clear classification,The main inner bag can accommodate notebook computers of 17 inches, A4 size magazines, umbrellas, cameras, wallets, clothes,etc. This product is suitable for a variety of occasions such as daily working, school, travel, climbing, hiking and cycling. ??[SATISFACTION GUARANTEE]You will get a backpack:Product size:511*325*185mm,Weight:1000g,Large capacity.If you have any questions,Please contact us in time, we will provide you with satisfactory service within 24 hours.