This LED smart backpack features a 3D waterproof design with a 48x48 full-color dot matrix screen that supports text, pictures, and GIFs. Easily control via the 'LOY eye' app by scanning the QR code and connecting through Bluetooth. Spacious with multiple compartments, it is perfect for travel, hiking, and as a cool gift. Made of durable plastic with built-in battery and adjustable shoulder straps for comfort.