USB 3.0, Mini External Card Reader & Writer, 24-in-1 lets you easily access media and manage content - including read, write, copy and card-to-card copying. Compatible with SecureDigital (SD), MultiMedia memory cards (MMC) and microSD. USB 3.0 data transfer speeds up to 5 Gbs, backward compatible with previous versions. Supports automatic card detection. Plug and play; hot-swappable. Windows and Mac compatible. Bus-powered; requires no external power supply. LED light for memory card status; flashes blue while reading and writing. Compact and lightweight design - makes storage or travel convenient. 3 Year Warranty.