The KH2508A KVM switch is a control unit that allows IT administrators to access and control multiple computers from two PS/2 or USB KVM consoles (two bus). Operators working at up to two consoles can independently and simultaneously take control of up to 8 computers. By daisy chaining up to 15 additional switches, as many as 128 computers can be controlled from the original KVM consoles.1x KH2508A Cat 5 High-Density KVM Switch1x Firmware LINS04A2-J11G Upgrade Cable1x LIN2-481K-E12G Power Cord1x Rack Mount Kit1x Foot Pad Set (4 pcs.)1x User Instructions