1,Accurate Tuning: Dial each key to test the intonation while making, adjust the pitch downward, adjust the low pitch upward, each instrument is carefully tuned. 2,Professional and Practical: Our 17 key thumb piano is very professional and practical, and can bring a fun experience to your playing and entertainment. 3,Charming Appearance: Our 17 key thumb piano has a charming and cute appearance that your family and kids will enjoy, making it a great holiday gift for them. 4,Metal Keys: The thumb piano keys are made of metal, with significantly longer vibrations, longer sustaining, and distinct echoes. 5,Acrylic Material: The thumb piano is made of acrylic material, with high hardness, stable structure, and not easy to wear and run the sound. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store