Logitech Unifying Receiver

Logitech Unifying Receiver is a wireless receiver that can connect up to 6 compatibles wireless mice and keyboards to your computer.

Setup with NixOS

Just add the following lines to /etc/nixos/configuration.nix

   hardware.logitech.wireless.enable = true;
   hardware.logitech.wireless.enableGraphical = true;

then

   sudo nixos-rebuild switch

Additional tips

See this page on ArchLinux wiki