7 white bowls made of quartz crystal are played. The frequency and tone of each bowl is different. The frequencies of the 7 bowls and the frequencies of the 7 main chakras in our body are the same. The vibrations of the frequencies emitted from the crystal bowls can be felt in the region of the chakra in the body, when the bowl of the same frequency for any chakra is played. For example, frequencies can be felt in the region of the heart chakra, when a bowl with the same frequency of the heart chakra is played.