Satechi Aluminum Clamp Hub Premium 4-Port USB 3.0 - Compatible with iMacs Released 2012 and Later SUPER SPEED USB 3.0 - take advantage of lightning-fast USB 3.0 and turn one USB 3.0 ports into 4 ports SECURE CLAMP GRIP - conveniently clamps to your monitor screen for easy access to 4 USB 3.0 ports EASY TO USE - features a plug and play and hot swappable design SLEEK, COMPACT DESIGN  modern metallic finish complements Apple computers and products COMPATIBILITY - supports iMac models released 2012 and later