Dual Micro- SD to Mini PCIe adapter is low - cost SSD and for Ready - boost solution for laptop computers. Your Micro- SD card can easily into the half the size of the Mini card slot of newer laptops with MR15 The item design of 2 Micro- SD slots, integrates a high performance AU6472 flash card controller as well as a splendidly efficient hardware DMA engine and an internal 1.8 V regulators. While it is fully compliant with The USB Device Class Definition for Mass Storage and Bulk - Transport V1.0. Boosts System Performance in Windows 7. perfect for use with the Micro- SD for ReadyBoost and Data backup. A Windows feature allows you to boost your System Performance with fast caching directly to the Micro- SD Card. This allows you to access the Data stored on your Micro- SD Card faster - than accessing it from your hard disk drive. Designed for use with laptop / netbook computers. Designed 2 slots for two MicroSD cards Type: Add On Cards Type: Cable Adapter Interface Type: MINI PCIE Compatible with Windows 7 / Vista / XP and OS Fully compatible with USB 2.0 High Speed and backward compatible with USB 1.1 . Windows generic Mass Storage Class driver supported. Supports Windows ME/2000/XP/Vista/7 and OS. 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. This item is standard USB mass storage device. Design for Extension/Secondary HDD. Application is readyboost and backup/Storage functions. Basically,the adapter can't bootable to windows OS depend on memory card type. Support SD card type: Micro- SD/SDHC/SDXC, TF Card Condition : Brand New Memory Card Supported : TF/ SDHC/ SDXC,TF MPN : MINI PCIE SD TF MEMORY Adapter Form Factor : Mini PCIE Type : Card Adapter colour:Silver + blue Material:PCB size:50*30*5mm Package Contents: 1*Card Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.