Item Type: Tuning Fork_x000D_ Material: Aluminum alloy + beech wood_x000D_ Tuning Fork Frequency:_x000D_ 174Hz tuning fork_x000D_ 285Hz tuning fork_x000D_ 396Hz tuning fork_x000D_ 417Hz tuning fork_x000D_ 528Hz tuning fork_x000D_ 639Hz tuning fork_x000D_ 741Hz tuning fork_x000D_ 852Hz tuning fork_x000D_ 963Hz tuning fork 1Promotes Relaxation: Tuning forks can promote relaxation, and tuning fork therapy helps induce a deeper state of relaxed thoughts. 2Easy Operation: The resonant tuning fork can be used as a crystal energy cleanser, a good sound therapy instrument, easy to carry and operate. 3Smooth Edge: The edge of the resonance tuning fork is round and smooth without burrs, so you don't have to worry about scratching your hands. 4Improves Clarity: Tuning fork therapy helps improve metal clarity, concentration and cognitive function, improving physical and mental performance. 5Combined Use: Tuning forks can increase the effectiveness of alternative therapies, and tuning fork therapy can be combined with meditation, massage therapy, and acupressure. 9 x Tuning Forks 1 x Hammer 1 xStorage Bag