Universal card reader USB 2.0. 4 slots for the card. Supports cards: SD, MMC, RS-MMC, Mini SD, T-Flash, Micro SD, MS / MS PRO, MS Duo / MS PRO Duo, M2 Data transfer rate up to 480MB / s (USB 2.0) Works with: Windows 98/2000 / ME / NT / XP / Vista / Windows 7 / Unix / Mac OS 8.6 or higher. Requires USB 2.0.