ChillCheer Full-Color LED Dot-Matrix Backpack — Programmable Waterproof Billboard Laptop Bag

Full-color LED backpack with a dot-matrix display built into waterproof cloth — a programmable screen that lets you upload images and GIFs from your phone, create custom content in the APP, or doodle your own messages. Perfect for holiday wishes, traveling, work, advertising, and hiking. Constructed from scratch-resistant, waterproof materials for long-lasting use. Comfort features include adjustable wide shoulder straps and a breathable mesh back panel for added stability. Spacious, expandable storage holds bottles, books, documents, wallets, pens, cell phones, tablets, mobile power, laptops, etc., making it ideal for daily commutes, study, or trips. Quick setup: 1. Connect your power bank 2. Download the APP 3. Connect Bluetooth 4. Start using (please refer to the manual for using this product). Includes 12 months warranty and 24/7 customer service — contact us anytime with questions.