Secure Digital (SD) Multimedia Mobility Combo Kit of Sandisk 2GB microSD, SD Adapter, miniSD adapter and USB (Secure Digitial) SD High Speed Purple Color Card Reader / Writer Kit include 4 items: 2GB microSD/TF memory card, SD adapter, miniSD adapter and USB Secure Digital card reader/writer System Requirements - Windows Vista (ReadyBoost not supported), Windows 2000 SP3 and SP4, Windows XP SP1 and SP2, Mac OS 10.2.x and above Reader is USB 2.0 interface (USB 1.1 compliant) LED indicator light on reader to indicate USB connectivity