Your Unifying USB receiver can be paired with up to six Unifying devices at a time. You can determine if your Logitech devices are Unifying by this logo:
To connect Unifying devices to your Unifying USB receiver:
Launch the Logitech Unifying software.
NOTE: If you don't already have it installed, you can download Unifying software from the Software Downloads page.
At the bottom of the Welcome screen, click Next.
NOTE: These instructions use Windows screenshots. Macintosh will look slightly different, but the instructions are the same.
When you see the "Restart the device…" screen, follow the on-screen instructions to turn your device off and then back on.
When your device is detected, you'll see a "We have detected your…" confirmation screen. If you connected a:
If your device connected successfully, click Yes and then Next.
If your device doesn't work right away, wait a minute to see if it connects. If it doesn't, select No and then click Next to restart the pairing process from Step 1 above.
Click Finish to exit the Logitech Unifying Software (or Pair Another Device to pair additional devices). Your device should now be connected.