37 Bluetooth Smart application indicator. 4 x 9.2 cm LED display Programmable car LED indicator Flexible LED Display Panel: Our LED display measures 37.4 x 9.2 cm and is lightweight. This flexible LED display can be folded freely, making it very convenient and adaptable to irregular surfaces. The graphics are clear and the screen is versatile. This LED display panel utilizes a waterproofing process, coupled with a resin colloid surface to better protect the internal light, resulting in IP65 impact resistance, low energy consumption, and a long lifespan. You don't have to worry about overheating or damage. The display panel is easy to install with a smart app. Simply turn on your phone's Bluetooth and connect the LED panel to the app. The programmable LED scrolling supports dynamic adjustment of text, moving images, static images, graffiti, and music rhythm. You can also adjust the brightness and speed to suit your needs. Easy to Install: The LED display panel is thin and lightweight, allowing it to be folded freely and placed anywhere in your car. All you have to do is apply it to your car windshield like a sticker and peel it off. It's very convenient. 【Suitable for Multi-stage】The LED display board is suitable for cars, trucks, bars, indoor billboards, holiday parties, weddings, camping, children's room signs, LED car signs, which is the most eye-catching decoration, you can freely DIY the content you want.