Size: 7 * 17cm Bluetooth APP Control: Download the APP, is controlled by a bluetooth-connected app. The APP built in a lot of interesting patterns and animations, APP will continue to update and upgrade. DIY Design: You can DIY design text, graffiti, animations at to suit your own creative style, you can also adjust the brightness and speed and display mode, achieve the display you want. Flexible and Portable: Light signs for car adopts 2121 model RGB beads, displaying clear and bright, so customers can easily notice your carThe LED matrix panel is light and thin, Flexible board design, can be bent and folded at will. Battery Powered, the LED sign is thin and light, flexible board design, 500mAh lithium battery directly supplies power, can run for 3-4 hours when fully charged. Type-C charging port. Widely Use: The LED sign is widely used in car advertisement, shops, bars, restaurants, or Christmas, Halloween, party, birthday, new year etc.