This item is printed music for the song "What Child is This" arranged for trumpet, alto sax/soprano sax, trombone, and piano/rhythm. It can also be used to sing with. Very simple and sweet. Great for a Christmas eve prelude or special or congregational song. This is a great work for the Christmas season. A nice easy feel. Note that there is a sample file to peruse before you purchase. Three piece horn feature. Moderate difficulty.