Many people use keyboards, mice, kits or touchpads from Logitech. The miniature Logitech Unifying Receiver allows you to connect up to 6 devices to it simultaneously. Despite the fact that the devices work in Linux "out of the box", many users have problems when adding additional equipment to the Logitech Unifying Receiver. There is a convenient way to solve this problem - the Solaar application.
Solaar allows you to manage devices connected to the Unifying Receiver, as well as perform additional settings on equipment that supports this (for example, set the Fn key mechanism, smooth scrolling or DPI).