OPLUZ 4 Slots USB 3.0 SD Card Reader with a 13CM Flexible USB Cord Memory Card Reader for SD, Micro SD, MMC Cards - Dual Card Read simultaneously Backward compatible with 2.0/1.1 base on Plug and play; Hot swapping Dual slots for both SD and Micro SD cards, it is very convenient to transfer data between SD cards or Micro SD(T-flash) cards directly. No drivers required for Windows 8 / 7 / Vista or Mac OS X 10.2 and above. In Box: OPLUZ USB 3.0 Memory Card Reader, hassle-free 18-month warranty. LED indicator for working status, keep on when connected, keep flashing when transfering data.