Features: The sound is amazing, clear, strong and deep, and rich vibration-resonate with the power to heal. When you playing the crystal singing bowl, you are not just performing a sound therapy, but also a crystal healing that is extremely penetrating. A nice gift for friends and families. The sound produced resonates with nature\'s own frequencies and affects the frequencies at which nearby objects form molecules. The rubber-ring is non-slip and sturdy, providing you with a perfect audiotherapy trip. The edges of the crystal music bowl are carefully polished. 2 playing methods: one way is that knock the bowl gently and slowly, another way is use the mallet friction slight on the bowl mouth.