♫ [EASY TO PLAY & WIDE USE] English manual book, songbook help you tune and play this finger piano easily. Best gift for kids, adults, beginners, professionals and bands. ♫ [INTERNATIONAL STANDARD C TUNE] 17 keys / notes: 1(D), 2(B), 3(G), 4(E), 5(C5), 6(A), 7(F), 8(D), 9(C4), 10(E), 11(G), 12(B), 13(D), 14(F), 15(A), 16(C6), 17(E).