uxcell LED Badge Digital Scrolling Message Name Tag Display Portable Rechargeable US plug Yellow Free Driver Installation Easy to use, programmable through your PC, supported all windows version, not available for IOS. Installation - Download the software, then just open the software to input text. Please check the link in the description or package. The screen can store max. 700 ASCII letters as well as 350 Asia letters. World language is supported, unlimited number of message. Power by rechargeable Lithium battery(built-in), it can run more than 9 hour.