USB 2.0 Super Speed Multi-Card Reader for SD/SDHC/SDXC/MS/CF Cards Support System: Windows98/ME/2000/XP/Vista/7/Mac OS 8.6 and above systems Standard high-speed USB 2.0 interface, compatible with USB 1.1, no need to install driver Per second 480 Mb (480Mb / s) data transfer rate, usually read and write speeds of up to 20m / s Slot with automatic detection function, when a memory card is inserted automatically detects and alerts