NOT for supporting any I/O card, Linear Flashcard, Panasonic P2 card, or SRAM card. Specifications: 1. Support USB 3.0 and USB mass storage device class 2. Compatible with USB 2.0 3. Support two Type I/II ATA flash PCMCIA cards(does not support any I/O card, Linear Flash card, Panasonic P2 card, or SRAM card) 4. Support 3.3 V /5V ATA flash card interface 5. Support SD/SDHC/SDXC card up to spec 3.0; capacity up to 2TB 6. Native driver supported by Windows 10/8/7/VISTA/XP/2000/ME, Mac OS 9.x or above, Linux Kernal 2.4.2 or above, Chrome OS, and any other OS which supports USB 2.0 mass storage device class. 3.3 V/5 V ATA interface switch settings: The ATA card interface pf the reader supports 3.3 V or 5 V, which is determined by the switch on the rear panel. The default setting is 3.3 V; if the ATA card can not be identified with 3.3 V interface, please switch to 5 V and try again. Please be noted that the USB connection should be removed before adjusting the switch.