The Logitech “Unifying” wireless USB receiver allows one receiver to work with multiple Logitech mice upto 6 devices can be added
First you need to download the unifying software from the link below
https://download01.logi.com/web/ftp/pub/techsupport/unifying/unifying252.exe
Install and run the unifying software then follow the instructions to add your Logitech devices one at a time, once the software has been run and added the devices – you can now use all devices added with just one receiver
*Note devices used must be compatible with Unifying Receiver