Premium Quality - This harp instrument is made by solid mahogany resonance box and iron keys to make sure the sound is clear and gentle. | Upgraded Design - Compared with wood saddle, the iron saddle we used can transmit the vibration better and avoid saddle wear, enabling our product to use for a longer time. | 16-string Design - 1 (G3), 2 (A3), 3 (GB3), 4 (C4), 5 (D4), 6 (E4), 7 (F4), 8 (G4), 9 (A4), 10 (B4), 11 (C5), 12 (D5), 13 (E5), 14 (F5), 15 (G5), 16 (A5). C major scale. It is equipped with a set of strings and a special wrench to adjust the tone of each string. Tip: You can use a small hammer to tap the wrench lightly, so that achieves a fine-tuning effect. You can tune to the required scale according to the needs of the song | Pure Sound - When you gently tap a string, it creates a continuous whistling effect the space, which can relax our body and mind. | Exquisite Appearance Design - the unique music pattern on the sound hole is designed by professional designer, symbolizing a wonderful musical journey. | [After-sales Service] We are looking forward to provide you a wonderful shopping experience! If there is any question with the item you received, please feel free to contact us on amazon. We will solve it for you at once.