Tripp Lite 4-Port DisplayPort KVM Switch w/Audio, Cables and USB 3.0 SuperSpeed Hub - KVM / audio / USB switch - 4 x KVM / audio / USB - 1 local user
Amazon
TRIPP LITE 4-Port DisplayPort KVM Switch with Audio, Cables & USB 3.0 Hub (B004-DPUA4-K)
TeciSoft
Tripp Lite B004-Dpua4-K 4-Port Displayport Kvm Switch With Audio, Cables And Usb 3.0 Superspeed Hub