SD/TF Dual Slots for Multi Cards: SD Card Reader is designed with SD/Micro SD two card slots for multi-memory cards. The SD slot supports SD/SDXC/SDHC/SD/MMC/RS-MMC/cards, and the TF slot supports Micro SD/Micro SDXC/Micro SDHC cards. 2 Cards Work Simultaneously: The USB Card Reader could read and write on two cards at the same time. You can easily transfer data from multiple memory cards without repeated plugging and unplugging. 5Gbps High-Speed: With the USB 3.0 port, the data transfer speed of Micro SD Card Reader can be up to 5Gbps, which is 10X faster than USB 2.0 (480 Mbps). You can transfer lots of photos in bulk from the camera in seconds. Wide Compatibility: This Memory Card Reader can be perfectly compatible with Windows 11 / 10 / 8.1 / 8 / 7 / XP / Vista, Mac OS, Linux, Chrome OS, etc. No matter what type of computer you use, it's perfect for your expansion needs. Plug and Play: USB Card Adapter can plug play for any supported system. No complicated driver download and installation steps are required. You can plug and play to read and write your memory cards at any time.