USB 3.0 Multi-Card Reader/Writer. Compatible with CompactFlash (CF), Memory Stick (M2), MagicGate (MG), Secure Digital (SD and micro SD), Multimedia (MMC) and more. USB 3.0 data transfer speeds up to 5 Gbs; backward compatible with previous versions. Plug and play; hot-swappable. Windows and Mac compatible. Bus-powered; requires no external power supply. LED lights for memory card status; blue indicates 3.0 connection and red indicates 2.0 connection.