With 5V USB upgrade voltage technology, the scrolling LED sign is extremely low heat, touchable and safe to use. No socket limitation, you can charge your LED panel with power bank, laptop, TV, etc.. (Note: Do not use a usb interface with output voltage exceeding 5v or a rated current lower than 2A for power supply.) Built around a bright, pixel-dense LED display, smart nice LED sign display as you would expect! It can be programmed to say what you want it to and produces high-resolution messages for drivers & facilitates safer driving environments. Mobile APP control, Diverse app functions can meet the different needs of users Improve user experience, Flexible screen design can be bent at will. IP65 waterproof Adhesive dispensing process, water-proof and moisture-proof, no fear of bad weather. Using high quality raw materials and Advanced production technology, with High efficiency, energy saving, environmental protection and other advantages. The remote control needs CR2032 button battery (battery not provided) Specifications:A:16x32(70x173mm)/B:16x64(92x374mm)/C:20x64(102x348mm) Colour:Black Material:Plastic Package Contents: 1 * LED soft screen 1 * remote control 1 * charging cable 1 * Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.