Features： 1、Promotes Relaxation: Tuning forks can promote relaxation, and tuning fork therapy helps induce a deeper state of relaxed thoughts. 2、Easy Operation: The resonant tuning fork can be used as a crystal energy cleanser, a good sound therapy instrument, easy to carry and operate. 3、Smooth 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. 4、Improves Clarity: Tuning fork therapy helps improve metal clarity, concentration and cognitive function, improving physical and mental performance. 5、Combined Use: Tuning forks can increase the effectiveness of alternative therapies, and tuning fork therapy can be combined with meditation, massage therapy, and acupressure. Specification： Item Type: Tuning Fork Material: Aluminum alloy + beech wood Tuning Fork Frequency: 174Hz tuning fork 285Hz tuning fork 396Hz tuning fork 417Hz tuning fork 528Hz tuning fork 639Hz tuning fork 741Hz tuning fork 852Hz tuning fork 963Hz tuning fork Package List： 9 x Tuning Forks 1 x Hammer 1 x Storage Bag