This backpack features a built-in, full-color high-resolution LCD screen (1360*800), functioning as a programmable sign for portable billboards, advertisements, holiday messages, slogans, and business promotions, you can play high-definition videos simply by connecting a USB drive. It’s perfect for commuting, traveling, cycling, outdoor adventures, work, or even as a hiking backpack or a unique gift for friends. The backpack requires only a mobile power supply (not included) to display your design or video anytime, anywhere, making it highly portable. For quantities of 48 or more, the price is based on sea freight rates.