This is a steel tongue drum. It's a cute, palm-sized mini ethereal drum (slit drum). With a compact 3-inch size, it can play six different scales. Perfect for beginners and children's music education, anyone can easily produce pleasant sounds. The scale numbers are engraved on the striking surface, so you can naturally learn melodies just by tapping. The healing tones are perfect for relaxation and mood refreshment for adults as well as children. Please let me know which number you would like when purchasing. Thank you for viewing. Please tell me the number when purchasing.