The LaCie PassKey comes with Push/Push microSD connector, making it one of the most reliable options on the market. It s also backward-compatible with USB 1.1. The LaCie PassKey is of course compatible with all the latest and fastest microSD cards on the market. which includes microSD High Capacity. A product of the 5.5 Designers firm, the LaCie PassKey fits conveniently on a key ring, helping you take it with you wherever you go. The second in a line of new products produced in conjunction with 5.5 Designers, the stylish PassKey is a practical tool for your home or business, but its sophisticated and inventive design differentiates it from other card readers. With the new LaCie PassKey, you can easily recycle your old microSD cards and turn them into USB Flash Keys. Additionally, by using the PassKey, you can choose your own capacity for your new USB Flash Key, helping you customize the USB keys that you create. The fast transfer rate ensures that you can quickly and effectively bring new life to your old microSD cards, saving you time, money, and resources. Minimum System Requirements: Windows 2000, Windows XP or Windows Vista, Mac OS X v10.3.5 or higher. Box Contents: LaCie PassKey, Keyring.