Having Versatile Performances: tuning forks set is multifunctional, whether applied for music or health purposes, it produces a long and clear vibrating sound can be applied to clear crystals, clean house spaces, or for repair , sound , playing with your pets and moreMultiple Models to Use: tuning forks for come with 4 frequencies, including 128 Hz, 256 Hz, 512 Hz and 528 Hz, available for music, also suitable for yoga and meditation, notably, 528 Hz is the frequency of , which makes people calm when applied in meditationEasy for Your Traveling: technology tuning forks with ergonomic are made of materials, compact in size and light in weight, you can use somewhere as you flexibly; Put in your bag or in pouches provided, and then carry around with you Material : body tuning forks are made of aluminum material, impact resistant and non magnetic, sturdy and solid, strong against breakage or , besides, the silicone tuning fork hammer is made, soft and soothing, serving you for periods of timeConsiderate Tuning Fork Accessories: music tuning fork set comprises some tuning fork accessories, like tuning fork hammers, wipe cloth and pouches, to you with more conveniences; In some situations, you can the out of for wiping or storing, not making a messColour:black+silver+woodMaterial:Aluminum alloy + woodPackage Contents:4 * Tuning forks1 * Wipe cloth4 * Pouches2 * Tuning fork hammersOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.