Gelrova LED Backpack with App Control Screen, [Battery not included] 17 Inch Bookbag DIY Pixel Animation Programming Laptop Backpack, Unique Gift for Men or Women

HOW TO USE - - You need to prepare a 10000mAh power bank. Built-in USB port (inside backpack) to connect power bank. Refer to the manual to connect and use the APP. 10000mAh power bank can power the backpack for 6 hours. we do not provide mobile power. ^^ Control by our APP -- LOY SPACE app can be used with this Led backpack. You can change all settings through the app, add your custom pixel arts, photo or download other artworks/animations. The app is compatible with IOS and Android systems and is free to download from Google Store or APP Store.

^^ COMFORTABLE & BREATHABLE -- The adjustable shoulder straps and back are designed with a comfortable and breathable mesh, relieving the strain on your shoulder. The comfortable foam pad back made with soft mesh padding with good heat dissipation, giving your back maximum back support. ^^ LARGE CAPACITY - - It can hold (24L capacity) double-layer storage with multiple compartments in each layer, which is convenient for things like water bottles, books, documents, wallets, pens, cell phones, tablets, mobile power, 15.6 -inch laptops, etc. to meet the needs of daily work and study and travel.

^^ 100% GUARANTEE -- We offer a one-year guarantee. If there is a product quality problem with your backpack, you can request a replacement and you don't have to send it back. And if you have any questions about our products, please feel free to contact us. ^^ Gelrova aims to seamlessly integrate mobile LED into everyday life, allowing people to enjoy convenient communication while expressing their individuality. We welcome you to follow us and discover the endless possibilities. Whether it's adding vibrant colors to your surroundings or creating eye-catching displays, Gelrova brings a touch of uniqueness to the way you connect with the world.