Perfect Time-saving Choice for Data Transmission <br> Reading and writing on 2 cards simultaneously with 5Gbps- 10X faster than USB 2.0 data transfer rate, UGREEN 2 Slots Card Reader USB 3.0 allows you to transfer 1GB files in seconds. Less time waiting, more time enjoying. In addition, the USB 3.0 connector is backward compatible with USB 2.0 port.<br><br> Widely Compatible with Many kinds of USB A Devices <br> This USB3 card reader is compatible with a variety of operating systems like Mac OS, Chrome OS, Windows 10 / 8.1 / 8 / 7 / XP / Vista, Linux, allowing you to read flash cards on Macbook, PC, Smart TV, PS4 Pro, PS4, PS3, Xbox One, portable DVD player and other USB A Devices.<br><br> Universal Flash Cards Compatibility <br> SD slot: Support UHS-I SDXC / SDHC / SD / Extreme I III SD / Ultra II SD / MMC / RS-MMC / MMC Micro;<br> Micro SD/TF slot: Support UHS-I Micro SD / TF / Micro SDXC / Micro SDHC;<br><br> Excellent Design, Perfect for Travel <br> Compact and lightweight design makes this sdxc card reader easy to store even in your pocket.The cap protects the USB connection against dust, knock or bump.The keychain design makes this USB SD Card Reader easy to take and never need to worry about loss.<br>