Physical dimensions: 2.25 x 0.63 inches (57.15 x 16mm) Imprint size: 1.63 inches (41.4mm) Product materials: high impact plastic, metal components, and LED Compatibility: for Mac and PC Operating system: Microsoft Windows XP, 2000, ME, 98, 95, and Mac OS 8.6, and above Warranty: one year warranty With one simple push of the EZ button, your website will automatically activates on your browser Built-in LED Low power consumption USB powered, attached 4ft USB cable Plug-and-play function Large logo imprint area, logos can also be printed on both sides Optional customized logo imprinting for branding or promotion Optional fully customizable packaging options CE and FCC certified