IOGEAR GFR305SD Compact USB 3.0 SDXC(TM) Card/microSDXC(TM) Card Reader/Writer Memory card reader for smartphones, tablets & cameras; SuperSpeed transfer rate of up to 5Gbps ideal for moving large files such as full-resolution photos, documents & videos between computers & mobile devices; Compatible with Windows(R)-supported operating systems & Mac OS(R) X with default driver; Supports SD(TM) Card, miniSD(TM) Card, SDHC(TM), miniSDHC(TM), RS MMC(TM), MMC Micro(R) with required adapter; Supports SDXC(TM), microSD(TM) Card, microSDHC(TM), microSDXC(TM), MMC, MMC Mobile(R), MMC4.0 & MMC4.2 without adapter; Device must be plugged into a USB 3.0 port in order to achieve SuperSpeed rates;