PROGRAMMABLE BLUETOOTH APP CONTROL: Easily connect to your phone via Bluetooth, the dedicated APP supports DIY editing of text, patterns and animations. No complicated setup required, you can adjust the scrolling speed, brightness and display mode with just a few taps, making it convenient for daily use. Flexible & Durable FPCB Material: Made of high-quality flexible FPCB matrix panel, this LED car sign can be bent slightly to fit different car windshields, dashboards or body surfaces. The waterproof and scratch-resistant design ensures long-term use even in rainy days or harsh environments. 7''x3'' COMPACT SIZE & USB 5V POWER SUPPLY: The compact 7''x3'' size won't block your view while driving, and it's easy to install and store. Powered by USB 5V, you can connect it to the car charger, power bank or laptop, no need for extra batteries, saving you time and money. WIDE COMPATIBILITY FOR VEHICLES: Suitable for most cars, motorcycles, golf carts, SUVs and trucks. The included double-sided adhesive tape allows you to install it firmly anywhere, such as windshield, rear window or body, without damaging the car paint. BRIGHT & CLEAR DISPLAY: Equipped with high-brightness LED chips, the display is clear and eye-catching even in daylight. It can effectively convey your message, such as safety reminders, personalized slogans or advertising content, ensuring good visibility from a distance. A LED Sign Screen