The tuning fork set is made of aluminum alloy material, with fine workmanship and high precision. Aluminum alloy construction offers dependable, solid strength as well as - qualities. The resonance box, made of wood, the tuning fork is placed on this wooden speaker, which has an amplification effect. The sound quality is not too exaggerated, you feel that the resonance effect is more profound and stable, and the listening feeling is natural and comfortable. Widely used, 528 Hz is the frequency of love, perfect for deep relaxation, repair healing, stress pain relief, increased focus, and cleansing of the mind and body. Suitable for yoga therapy, SPA aromatherapy, tuning fork resonance teaching, hearing test, meditation and other scenarios. Colour:Silver & Wood Color Material:Wood + aluminum alloy Size:Resonant Box:About 18cm long Package Contents: 1 x Tuning Fork 1 x Resonant Box 1 x Hammer