Tera-quartz Tera Crystal Tuner (with case) The vibration of the Tera Crystal Tuner: Regulates frequency and promotes good sleep. Helps to restore the body to a normal state. Depending on the person, Some may feel a deep sense of security, Making it ideal as a tool for meditation and healing. Receive beautiful, clear, deep, and rich vibrational resonance and healing. In addition, It is said to activate cells, prevent aging, boost immunity, thin the blood, and alleviate electromagnetic wave interference. A crystal tuning fork made of high-purity quartz with a purity of 99.99% or more. Ideal for meditation and healing tools. The use of crystal allows for: Highly accurate tuning, Powerful resonance with long sustain, Clear and powerful tones. Made of 16mm fused quartz, The crystal tuner has been treated with terahertz processing. Because it has been irradiated with terahertz waves, it is a rather expensive product. Comes with a quartz tuning fork, mallet, and a dedicated case. There are some minor scratches, but it has been used cleanly. The frequency of use is about once a month, not very often. Please understand that this is a used item before purchasing.