This hybrid KVM switch lets you control 16 USB (Universal Serial Bus) or PS/2 computers using only one PS/2 keyboard, mouse, & monitor. A versatile KVM solution, the switch is compatible with PC, Mac & Sun Servers & Systems & offers hot-pluggable operation, allowing you to add or remove computers without having to shut down the KVM switch. Providing scalable KVM control, the USB+PS/2 switch delivers control of up to 136 computers/servers by cascading 16 additional KVM switches. Plus, the switch can be rackmounted into 1U of cabinet space & features rear panel cable connections, eliminating mess & tangle while saving valuable workspace.