Simbow Multi-functional Skateboard Backpack Laptop Rucksack, Water Resistant Color:Black During use

During use

and when it reaches 10%

Shelf Life

Perfectly round holes

2:1(38inch@1M)Projection Area: 40-300 inchProjection Distance :1-8mAspect Ratio: 4:3/16:9/16:10Keystone Correction: Automatic vertical

Simbow Multi-functional Skateboard Backpack Laptop Rucksack, Water Resistant Color:Black During use2021 Upgraded Backpack A multi functional rainproof skateboard backpack. Three straps on the backpack to secure the skateboard, so that you can carry your skateboard with you anywhere. Large capacity, which can simultaneously put in a laptop and a tablet computer, also can put in notebooks, folders, clothes, etc. The inside small bags are designed for small items such as mobile phones, pens, charge banks,etc. Side bags are for waterbottles and