We have 2 Backpack to choose from.The normal model is a usb charging pack.The upgrade is a multi-purpose backpack that allows you to recharge and listen to songs, and it has a password lock to provide security for your financial security.<br>capacity: 20L Following<br>Package internal structure: Pocket computer,Mobile phone bag,Sandwich zipper bag,Credentials bag,Pocket camera,Inside pocket with a zipper<br>Besides being the safest backpack it is also the most convenient backpack with features such as:<br>- Integrated USB charging port<br>- Illuminating safety strips<br>- Weight balance<br>- Luggage strap<br>- Adjustable open angles<br>- YKK zippers<br>- Advanced storage design<br>Features: wear resistance, burden reduction, anti-theft, shock resistant, <br>Applicable gift occasions: Travel souvenir<br>Material: Canvas<br>Bag shape: Vertical square type<br>Colour:black,gray,Blue<br>package include 1pc baclkpack
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