Kingsons 13.3" 15.6" 17.3" inch Men Women Laptop Backpack Travel Business school Bags Waterproof Wear-resistant Backpacks

Size: KS3140W-13inches(27cm*16cm*43.5cm)

KS3140W-15inches(31cm*19cm*46cm)

KS3140W-17inches (37cm*22cm*50cm)

KS3144W-15inches(31cm*13cm*46cm)

Note: There is no mobile powerbatterycomes with the backpack inside.

If you want touseExternal USB Charge Function, you have to do as follows:

1.Buy a mobile power

2.Connect your mobile power with the USB interface inside the backpack

3.Connect your phone with the USB interface outside the backpack

4.Charging begins.

There are 2 kinds of mobile power in the market.

1:Plug in your phone, you can start charging

2:Plug in your phone also need to press button of mobile power then start charging

To cope with this backpack, we suggest purchase ofthefirst mobile power.