Koolertron Programmable LED Digital Scrolling Message Name Tag Id Badge(12x48 Pixels) (Red) Store up to 8 different messages, 2 logos, and 2000 Characters. Number of English characters not moving: 6 Rechargeable battery or run through AC. Programmable through your PC on XP, Vista, Windows 7, or Windows 8. Not available for Mac. 8 Display Effects (Scroll, Snow, Flash, Hold,Left,Right,Up,Down), 6 Level Speed, 11 animated emoticons Adjustable Brightness (25%, 50%, 75%, 100%) Pins to your shirt or with powerful magnet