Features:This Card Adapter has two Slots and maximally support 32G TF card, when computer read the disks, it can identify the two disks at same time.It is support Plug and Play.Designed for use with laptop / notebook computers. Compatible with Windows 7 / Vista / XP and Mac OS.Fully compatible with USB 2.0 High Speed and backward compatible with USB 1.1 specifications.Complies with USB Device Class Definition for Mass Storage and Bulk-Transport V1.0. Complies with Secure Digital Card (SD) specification up to Ver. 3.0 (SDXC). Integrated hardware DMA engine enhances overall performance of data transfers. USB 2.0 based PCI Express Half-Mini Card design, suitable for any PCI Express Mini Card slot.Basically,the adapter can't bootable to windows OS depend on memory card type.