1.Aluminum case style design, ideal For Mac Pro, iMac, MacBook Air, MacBook Pro, MacBook, Mac mini and more. 2.Add 3 slots Card Reader to your computer; Supports SDXC (up to 2TB), SDHC, SD, Micro SDXC, Micro SDHC, Micro SD cards. 3.Add 3 USB 3.0 ports to your computer , and backward compatible with USB 2.0 / 1.1. 4.Plug and play , Hot swapping. Powered by USB (no external power supply or battery required). 5.More Compatibility , Windows 7 / 8/10 (32bit/ 64bit ) and MAC OS 10.X or above version.