Aten 8 port PS2 KVM CS9138Q9-AT-G CS9138 is a high-efficiency KVM Switch which provides the most efficient solution to fulfill the management needs of server networks. It is a KVM Switch with 8 ports and can control 8 computers. It allows connections in 3 tiers by cascade. With 73 sets of CS9138, users can connect up to 512 servers. Features One PS/2 console controls 8 computers. Cascadable up to 3 levels - provides up to 512 computers. Computer selection via front panel pushbuttons, hotkeys or On Screen Display (OSD). Keyboard and mouse emulation for error free booting. Supports Microsoft IntelliMouse, Logitech MouseMan, FirstMouse, IBM Scrollpoint Mouse. OSD automatically adjusts to resolution changes. Auto Scan function to monitor computer operation. Superior video quality: up to 1920 x 1440; DDC2B. Available in silver and black. Special design for easy stacking. Rack mountable in 19" (1U) system rack. Package Content 1x 8-Port PS/2 KVM Switch 1x Power Adapter 1x Rack Mount Kit 1x User Manual 1x Quick Start Guide