Solaar is a device manager for Logitech's Unifying Receiver. It is able to pair/unpair devices to the receiver, and for most devices read battery status. It comes in two flavors, command-line and GUI. Both are able to list the devices paired to a Unifying Receiver, show detailed info for each device, and also pair/unpair supported devices with the receiver. WWW: https://pwr-solaar.github.io/Solaar/