We were very pleased to find out that you can in fact use only one Raycon earbud at any given time. The left earbud is the main one, meaning that it can be used just by itself. You can also connect two different devices, and use each earbud for each device. In order to do this, you will need to turn the right earbud off. Next, press the button for around 20 seconds till you see a red and blue light flash. This means that the right ear can be used on its own. To use both earbuds in binaural mode, turn both earbuds off at precisely the same time and press the button for 20 seconds till you see the red and blue light.