KaKo’o™ Mini Keychain Harmonicas are great for beginners to masters. Our 4-hole 8 notes diatonic harmonicas are suitable for Blues, Folk, Rock, Country, Jazz and so many more! Great for musical travelers on the go, the exquisite workmanship, beautiful appearance, accurate tone and responsiveness are what make a KaKo’o Harmonica the only one you will ever need. Come make music with KaKo’o™ Harmonicas! Ages 5+ Each Mini Keychain Harmonica Set comes with 1 x Mini Harmonica (key of C), 1 x Keychain and Ring Color Options: Blue, Gold, Red, Silver.