Keyboard, mouse, and other PC accessory-maker Logitech recently introduced the Logitech Unifying app for Chromebook.
The app, which is available in the Chrome Web Store, allows you to view which devices are connecting to your computer and pair/un-pair them.
This allows your Chromebook or Chromebox to work with multiple wireless mice and keyboards from Logitech that use the USB Unifying receiver. Up to six devices can be connected to a single receiver. Logitech has a list of ChromeOS-compatible devices listed at logitech.com/chrome. The list shows a compatible keyboard, USB or wireless headsets, and multiple mice.