Digitek all-in-one high-speed Card Reader is ultra-slim, trendy & compact. Supports SD, MMC, RS-MMC, T Flash, MS, MS Pro, MS Duo, MS Pro Duo, M2, Mini SD, T Flash, M2. No external power needed. LED Light clew Read & Write Status. Up to 400MB/s Accessibility Speed. USB 2.0 with support for Windows 98/98SE/ME/2000/XP/Vista/7, Mac OS X9.0 and Linux 2.4 later version. Hot swapable Plug & Play.