MUMENG Silver 4 LED High speed 4 Port Aluminum USB 2.0 Hub with 30cm Shielded Cable for iMac, MacBook Air, MacBook Pro, MacBook, Mac Mini, PCs and Laptops Free drive, hot swapping, easy to use and carry. Easy to set up, Plug-n-Play, Hot swappable, Hot pluggable LED indicator reveals power status and hub working status. Support USB 2.0 hight speed, rates up to 480Mbps transmission Support System Windows 98 98SE 2000 ME XP Vista Mac OS 10.1 or later