If you've previously connected both channels using Bluetooth and want to reassign the connection type, do the following:

1. Download Logitech Options® software.
2. Open Logitech Options and on the home screen, click ADD DEVICE.

   

3. In the next window, on the left, select ADD UNIFYING DEVICE. A Logitech Unifying Software window will appear.

   

4. Put any channel you want to reassign connectivity in pairing mode (long press for three seconds until the LED starts to blink) and connect the USB Unifying receiver to your computer.
5. Follow the on-screen instructions in the Logitech Unifying Software. Once you complete the steps, your device will be successfully paired to your Unifying receiver.