1. Programmable LED matrix panel, built around a bright, dense LED display, smart, nice LED sign display as you would expect! It can be programmed to say whatever you want and generate high-resolution messages for drivers and facilitate a safer driving environment. 2. Ki powered LED car USB with 5V USB voltage technology, LED scroll sign is extremely low heat, touchable and safe to use. Without socket limitation, you can charge the LED panel with power bank, laptop, TV, etc. (Note: Do not use the USB interface with output voltage exceeding 5v or rated current lower than 2A to power. 3. Bluetooth APP Control: Download the application on your phone and connect the LED matrix panel via Bluetooth. You can edit text, DIY patterns, adjust the LED display screen brightness and music rhythm, perfectly meet your different needs. 4. High quality and high brightness, this programmable LED sign for car windshield is a colorful LED display with dimensions of 16X64 pixels. 5. High-quality LED car sign not only can emit high intensity light, but also has low power consumption, and the full color effect is brighter and soft without glare.