crystal usb flash drive 1.Capacity:512MB/1/2/4/8/16/32GB 2. ... time:2K in 3 days 4.Custom logo USB flash drive 1.Specification Available Capacities: 64MB,128MB,256MB,512MB,1GB,2GB ... ,4GB,8GBCompatibility: PC or Notebook with a USB interfaceOperating Systerm: Windows Vista/XP/2000/ME/98/95.Mac OS 8 ... .8(210.82mm*20.32mm Unique model crystal usb flash drive