Feature: 1. LED Backpack: Comes with a built in USB data port that needs to be connected to a power bank for operation. Please note that power bank is not included in the package, so you need to prepare your own. 2. Multi Functional Design: With sizes of approximately 15 x 7 x 18 inches, this LED backpack offers ample storage space. Features a large zippered pocket for a laptop, multiple compartments for cosmetics, tissues, keys, textbooks, laptop, phone, umbrella, and more. 3. DIY Customization: Connects to the for LOY EYES app via BT, allowing you to edit DIY text, animations, and images. Personalize the LED backpack with trendy designs that stand out in various scenes like travel, hiking, and motorcycle riding. 4. Structure Details: Made with 3D waterproof material, 1680pvc back panel, 48 x 48 full color dot screen that supports text, images, GIFs, and more. Adjustable shoulder straps and breathable materials ensure comfort and durability. 5. Perfect Gift: Featuring a programmable screen, this LED backpack is an ideal gift choice for Christmas, birthdays, and Valentine's Day for yourself or others. The shell is made of ABS, PC, 1680pvc material, ensuring safety and comfort during rides. Specification: Item Type: LED Backpack Material: ABS, PC, 1680 PVC Application: for LOY EYES APP Power Supply: USB powered Communication Method: BT Left Eye, Right Eye Screen Resolution: 48 x 48 Screen Pixel Pitch: P2 Size: Approx. 38.1 x 17.78 x 45.72cm / 15 x 7 x 18in . Package List: 1 x LED Backpack