Women Men LED Backpack Display Laptop Bag Smart Light Multi-function Waterproof Large Capacity Computer Backpacks Bluetooth-compatible Control Feature: 1. Colorful display screen, upload the fonts or pictures as you want, the system comes with text, pictures, GIF animation, easy and convenient editing template operation; Support for custom content, make and upload your favorite content anytime, anywhere; 2. Remind and warn that there are pedestrians walking in front of the vehicle behind, pay attention to avoid pedestrians; 3. In case of emergency, the color display screen can be displayed to remind and ask for help from surrounding people; 4. For romantic love, you can show the person you like on the display and express your love bravely; 5. Trendy front-end, cool colored lights make you the focus of everyone's attention; 6. Nightclub artifact, more quickly attract the eyes of the opposite sex