Dual-Monitor Mini-DisplayPort 1.1a KVM Control 4 Computers / Servers High Definition 2K (2650 x 1600) Resolution 3D Display Ready, 2x USB 2.0 Peripheral Hub, & Digital Audio (SPDIF)
Dual Monitor DisplayPort 1.2 KVM Control 4 Computers / Servers Supports Up To 4K UHD (3840 x 2160) Resolution 2x USB Peripheral Ports For Flash Drives, CAC, etc.
Additionally, you can use a CatX KVM Switch with DisplayPort video dongles, Desktop Over IP Matrix, or multiple 1-Port KVM Over IP Gateway to create a 4-Port DisplayPort KVM switching solution.