 There's a question about whether you can use the sound therapy together with the coils, and the answer to that is yes. The app has all these sounds on it. So each program is actually also a sound. So you can listen to the sounds and you'll get pretty good meditative experience. But when you plug in the cheat coils, then it turns the sound into electromagnetic field or energy field. But you can do both at the same time. You would just add a splitter and one side would go to the headphones and one side would go to the coils. That is also something that other devices cannot do.