ALL IN ONE CARD READER Slimmest design for portable usage luminous LED indicator inside USB ... plug Fully supports SD/MS memory card reader and writer Compliance with USB 2.0 full-speed, 12Mbps ... 2.4 or later, Mac OS 8.6 or later Reader and writer supports: smart media, multimedia, secure digital card, memory ... external power required Color printed logos are accepted USB CARD READER