Thats the first ceramics USB flash driver in the world. my company has to visit all around the famous domestic porcelain kiln,follow the traditional method, after the unglazed pottery, the glazing, bakes with glaze and 14 working procedures, three times in and out the porcelain kiln, burns above 1600 degrees high temperatures then we get the first ceramics series USB flash driver in the world. It uses the most representative blue and white porcelain which to be well known and absorbs the chinese traditional mascot figure four spirits image: the dragon and the rosefinch as the theme. Thats gorgeous and charming. Material:ceramics Certificate:CE ROHS FCC Capacity :2GB/4GB/8GB Operation temperature:0 to 70 Storage temperature:-25 to 85 Reading speed:12 MB/sec (Typ.) writing speed:4 MB/sec (Typ.) Working voltage:DC 5V±10% Data storage:10 years weight:2.4g Package Weight:0.05kg (0.11lb.) Package Size:5cm x 4cm x 3cm (1.97in x 1.57in x 1.18in)