It is a card reader, which supports upto 2 GB SD/MMC card.

 "IF" inserted a SD/MMC card, it turns into your normal flash thumb/pen/key drive. It can be the fastest and easiest way to move a large amount of data. USB 2.0 certified for fast data transfer (also backward compatible with USB 1.1). Store all your data, pictures, music and more on this pocket-sized device and then easily transfer files between your laptop and desktop. (No SD/MMC card is included in this auction.

Features:

• A small overall size of 5.5 (L) x 2.7 (W) x 0.8 (T) cm
• Comes with lanyard and a small keyring
• Comes with a fitting cap