Please Note:
2.4Ghz wireless devices, such as wireless keyboard and mouse adapters, may not work in close proximity to USB 3.0 devices or hubs. The Best Solution for Easier Access on Your iMac: Add Four USB 3.0 Ports to The Front Side
Supports Transfer Speeds up to 5Gbps (USB 3.0), 480Mbps (USB 2.0), 12Mbps (USB 1.1
Exclusively Designed for the iMac Slim Uni-Body Model, Released November, 2012 or Later. (21 inch / 27 inch / 5K)
Backwards Compatible, USB 2.0 and USB 1.1
Easy Setup, Plug & Play, Hot-Swappable