Yes, our Water Channel features isochronic brainwave entrainment.
The Focus@Will sequence engine combined with these specifically designed audio tracks are intended to promote deeper states of focus. Since we chose isochronic tones (as opposed to binaural beats), you do not need to be wearing headphones in order to enjoy the benefits of it. However, some people report hearing a humming or pulsating sound on Channels with Entrainment. These sounds are super subtle, but are part of the added Entrainment. If you find these sounds to be distracting, using headphones will help improve the experience on Channels with Entrainment.