TANGCORLE vacuum carry on backpack made of 900D high-density coated oxford, it is not only waterproof and resistant but also scratch-resistant. You don't need to worry about your backpack will be wet in rainy day. Airback backpack which feature with vacuum sealed compartments. You can compress and release air by manually pressing or using an air pump. This large-capacity men's travel backpack can be expandable to a 50L liters, ideal for trips lasting 5-7 days. It features multiple independent compartments where you can separately store clothes, shoes, daily necessities, documents, and other personal items. The main pocket have shoes compartment and wet and dry separate pocket and the important vacuum pocket not only can save your space,but also can orderly store away your every goods,the laptop compartment can hold 17.3 inch laptop , so your don't worry about your laptop will be broken. Air backpack with vacuum seal and durable zipper , but the vacuum pocket uses high-density vacuum specific zippers, making it difficult to open, but this is to ensure the top secret protection performance of the vacuum pocket. Meanwhile,the laptop backpack have lot of human design,such as adjustable chest strap,breathable shoulder strap and luggage strap.

1.when the red light is on,it indicates the battery less than 5%,should be charged in time

2.Long press 3 seconds to lock，Long press 3 seconds to unlock

3.Select only one suitable nozzle each time

4.Inflate: install one suitable nozzle to the inflationport,and connect to the products ,thenturn on the pump to start inflating

5.Deflate:install one suitable nozzle to the deflatioport,and connect to the products ,thenturn on the pump to start deflating

Warm Tips: Do not store the battery in a fully discharged state for an extended period. Lithium-ion battery products should be charged at least once a month during storage.