Programmable Scrolling SMD Dot Matrix LED Name Badge (12x48 pixels) Orange Store up to 6 different messages, 2 logos, and up to 1500 characters. Number of English characters not moving: 6 Rechargeable battery or run through AC. Dimensions: 4 x 1.3 x 0.2 inches Program available through included disk only; Programmable through your PC on XP, Vista, Windows 7, or Windows 8. Not available for Mac. Adjustable Brightness (25%, 50%, 75%, 100%) Pins to your shirt or with powerful magnet 4 display effects (Scroll, Snow, Flash, Hold) 5 Level Speed, 11 animated emoticons