ATEN 4-Port USB 2.0 KVMP Switch with Audio Support and Cables CS1734B (Silver) Maximum video resolution ; 2048 x 1536; DDC2B 4-port KVMP switch with USB 2.0 support and 2.1 surround sound audio 2-port USB 2.0 compliant hub built in - Dual interface supports computers with PS/2 or USB keyboard and mouse configurations Display Emulation Technology reads and remembers the monitor's display parameters to maintain optimum display settings when switching between computers Computer selection via front panel pushbuttons, OSD (On Screen Display), or Hotkeys