MR04 : USB type mPCIe / MiniCard adapter for standard SD card, SDXC support, SD High Speed CLK 50MHz, Genesys Logic GL823 chip, USB mass storage , SD2.0 memory card compliant USB type mPCIe / MiniCard adapter for SD card is very low-cost SSD and Ready-boost solution for laptop computers. USB 2.0 connected SD/MMC Flash Card Reader single slot. Supports USB 2.0 high-speed transmissionto Secure DigitalTM(SD), SDHC, SDXC, miniSD, microSD (T-Flash), MultiMediaCardTM(MMC), RS-MMC,MMCmicro, MMCmobile High Compatibility : Genesys Logic GL823, standard USB mass storage device. Design for Extension/Secondary HDD. Application for readyboost and backup/Storage function. Low power consumption and light weight, comparing to traditional HDDs speed and computer configuration PCI Express Mini Card Electromechanical Specification 1.0 (Use USB type), Universal Serial Bus Revision 2.0, Compliant with Universal Serial Bus Device Class Definition for Mass Storage Class Bulk Only Transport Ver1.0, Compliant with SD Memory Card Specification Version 2.0