Gear Head USB 2.0 Micro SD Card Reader, Red/Black/Blue (CR3000MSD) USB 2.0 high-speed connectivity Use as a flash drive (add memory) PC and Mac compatible 6-pack Includes 2 blue, 2 red, 2 black Reads/Writes to all Micro SD Memory Cards USB 2.0 High Speed Connectivity Use as a Flash Drive (Just Add Memory) PC & Mac Compatible Windows XP, Vista and 7 Mac OS 10.3 or Above