Capacity: 4 GB Brand Name: OEM USB Specification: USB 2.0 high speed Trasfer Rate: Hi-Speed USB 2.0 Certified, Compatible USB 1.1 Waranty: 1 year warranty. Operating System: ALL brands of computers, Windows 7/ Vista/XP/ 2000/ ME/ 98 and Mac OS 8.6 and above. Compatibility: PC or Mac with a USB interface Drivers: Required only for Windovs 98/95 (Download Available) Certification: CE,FCC, ROHS certificates Memory chip: Toshiba Shape: Gold Bar Read/whrite: Read speed 8-16 M/S, whrite speed 3-6 M/S. Weight: 50g Size: 6.0*2.3*1.3 cm Material: Metal Color: Gold Data Retention: Over 10 Years Power: No external power required Operating Temperatur: -10 to 55 degree Celsius Storage Temperatur: -20 to 55 degree Celsius Operating Humidity: 20%-90% Storage Humidity: 20%-93% Condition: New: A brand-new, unused, unopened, undamaged item in its original packaging. Light weight and compact in size. Durable to use. Looks shiny and well made. Great gift of the year for the gold buff in your family! Gold bar casing is made from metal. It features a very shiny gold coating on the exterior. These USB Memory sticks are NOT in retail packaging. They come in small plastic bags. This attractive and sophisticated metal-finish flash drive holds up to 4 gigabytes of data. Slide the button on the underside of the gold bar to reveal the chip-on-board USB connector. Once you get the item please inspect it and make sure you get exactly what you paid for. Once you satisfy with our products and service, please leave positive feedback for us and we will do the same for you. If you feel that you got an item that is different from what you ordered or if it arrived damaged or if you are not satisfied with the item please email us and we will love to work with you in resolving any issues. Do not hesitate to contact us anytime for any question via amazon message or e-mail, we will reply you within 12 hours. We are committed to your 100% customer satisfaction.