1. Sound healing tools are like keys that can open the doors to the rooms in your heart that you may not have known existed. 2. Besides chakra balancing, these sound therapy tuning forks can be integrated into a series of alternative and holistic therapies, such as acupuncture, sound - needle therapy, meditation, yoga, breathing exercises, etc. 3. The tuning forks are made of metal and can emit precise sounds each time they are used. They can help you find inner peace and enter a state of tranquility. 4. The detailed and easy - to - follow usage guide allows everyone to conduct sound healing. This guide is intended to help you discover the hidden transformative power of these ancient tools. 5. Material: Aluminum alloy 6. Color: Silver + Black 7. Package contents: - 4 tuning forks (The English patterns on the tuning forks are factory - configured and specific requests may not be accepted) - 1 tuning fork activator 8. Only the above package contents are included, and other products are not part of the package. 9. Note: Light reflection and different monitors may cause slight differences between the colors of the items in the picture and the actual objects. The allowable measurement error is around +/- 1 - 3 cm.