There is a Pair button on the receiver screen, so you add more Unifying devices, and an Unpair button on the screen for each currently paired device. The solaar GUI, shown here, displays the status of the receiver itself, and of each device connected to it. The package includes both GUI and CLI versions. The solaar package is available in the repositories of most Linux distributions I have installed it for testing with this mouse on openSUSE Tumbleweed, Fedora, Debian (testing), Ubuntu, Linux Mint, PCLinuxOS and openSUSE Leap. Fortunately (or rather, as usual.) some industrious Linux users have created the solaar utility to provide this capability. Logitech provides their options utility for this on Windows and Mac, but nothing for Linux. Once the first device is paired, if you want to do anything else you have to have a software package to manage the Unifying receiver. In fact, I had assume that they came already paired until I got this mouse and noticed the channel led blinking in pairing mode until I plugged in the Unifying receiver. When the mouse (or other Unifying device) is brand new out of the box, both it and the receiver are ready to pair, so the first time you use it they connect and you are able to work. Of course, to do this trick it needs a bit of software support. In case you aren't familiar with it, or what it can do, the Unifying receiver looks like an ordinary USB wireless dongle, but it can connect with up to six devices simultaneously. But this is the 'Jamie's Mostly Linux Stuff' blog, so we still need to look at one Linux-specific issue: the Logitech Unifying receiver. That pretty well covers the basics and special features of the M720 Triathlon mouse.

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