[4 Card Slot Design] - This USB SD card reader features SD, microSD, MS Duo and M2 card slots, making it easy to transfer the files you need between different devices or quickly view photos/videos. Aluminum Alloy Case] - Aluminum alloy case provides longer life and better protection while increasing portability and heat dissipation. Wide Compatibility] - The memory card reader is compatible with Windows, Mac OS, Linux and Android. Supports SDXC, SDHC, MMC, RS-MMC, Micro SDXC, Micro SD, Micro SDHC, MS Duo, MS DUO Pro, M2 cards. Plug and Play] - Memory card reader for PCs and laptops, no driver is required to transfer through the SD card reader. What's more, the card reader not only relieves the pressure on your removable memory, but also allows you to share photos and videos with your family and friends anytime, anywhere. COMPACT AND PORTABLE - This USB card reader is lightweight, heat dissipating and durable. The multifunctional card reader fits any device with a USB port.