USB 3.0 SD Card Reader, Rocketek 2 Slots Memory Card Reader with a Build-in Micro SD Card Cap for SDXC/SDHC/UHS-I SD Cards, TF/Micro SD Cards Reader - Take It as a USB 3.0 Flash Drive 2 Slots - SD/MMC + Micro SD. Support SDXC up to 2TB, SDHC, SD, MMC, RS-MMC, Micro SDXC, Micro SD, Micro SDHC Card and UHS-I Cards. Build-in Card Cap to Use as a USB 3.0 Flash Drive: It allow you store the Micro SD cards inside the memory card reader, and don't need to worry about losing the cards. Plug and play; Hot swapping; USB power (no external power or battery); Supper speed USB 3.0 and backward compatible with 2.0/1.1. Auto detect memory card; Support SDXC up to 2TB, SD V3.0, UHS-I standard, latest Micro SDXC and MMC 4.4. 24-month manufacturer's warranty and Free lifetime technical support.