8GB Doctor Model Flash Drive USB (Universal Serial Bus) 2.0 U Disk Specification: Storage Capacity: 8GBSupport USB (Universal Serial Bus) version 2.0 & 3.0 Hot Plug Play No external power is required 4.5V ~ 5.5V from USB (Universal Serial Bus) port Support Windows 7, 8, 2000 & XP without device drive Support solution for Linux kernel version 2.4 or later version Driveless for OS 9X or up Compatible with USB (Universal Serial Bus) 1.1/2.0 Operating Temp: -10 to +55 Deg.CStorage Temp: -20 to +55 Deg.CMore Than 10 Years Data Retention Package included:1 x u disk