Niceroker Portable Ring style USB2.0 4/8/16/32GB Flash Memory Drive Stick Pen Thumb U-Disk (32GB) Supports Windows 7 / 8 / 98 / Me / 2000 / XP / Vista / Linux 2.4, Mac OS 9.0 And above Etc Computer operating systems Speed: Writing Average - 6-12MB/Sec, Reading Average - 9-22MB/Sec Compatible with PC, notebook, MAC Easy to read and read in high speed Compact, slim, and light weight