Package Contents: You will receive a 128Hz tuning fork, an Allen key for tuning, two cleaning cloths, a silicone hammer, and a carrying strap. These accessories will help you use our product effectively. Material: The therapeutic tuning fork is made of high-quality aluminum alloy, providing a clear and crisp sound, a long vibration frequency, and a corrosion-resistant, rust-proof aluminum alloy structure, ensuring long-lasting use. Accurate Frequency: The tuning fork has a frequency of 128Hz and is calibrated with a frequency measuring instrument to guarantee frequency stability and excellent performance. Release Stress and Tension: The 128Hz therapeutic tuning fork has a clear, crisp, and relaxing sound and can be used in yoga to help regulate your emotions, relieve anxiety, and more quickly enter a state of deep relaxation. Usage: Aluminum tuning forks are available for multiple scenarios, perfect for sound therapy, yoga, meditation, stress relief, and relaxation, allowing you to stay balanced and healthy.