Hall Research 4 Channel Keyboard & Mouse Switch

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This convenient and reliable device is used to allow one user to control 4 PC's using only one keyboard and mouse. 
The Model 4-to-1 KM eliminates the need for 4 separate keyboards and mice. The 4-to-1 boasts the fastest switching times from one PC to another, is glitch free, and features full PS2 emulation and hot-plug capabilities.


  • No software required
  • No Power Supply needed
  • Quick and seamless switching between PC's
  • LED indicators of PC power status and PC selected
  • Comprehensive PS/2 protocol emulation for keyboard and mouse for all PC's at all times
  • Hot-swapping capabilities of the PC's and the devices
  • Error detection and recovery protocols
  • Returns to last selected PC after power off or reset
  • Small and compact design
  • Designed and manufactured in the USA

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