... Specification:Hot-selling products: pen drives, credit card USB drive, wrist USB drive, USB leather stick, wood USB drive, silicon USB drive, metal U disk and customized new models etc ... are small in size, but powerful in performance.InterfaceUSB 2.0 & 1.1Capacity16MB, 32MB, 64MB, 128MB, 256MB, 512MB, 1GB, 2GB, 4GB ...