Complex sentence: It is pitched in B, one octave above the soprano saxophone, although the keywork only extends to a written high E rather than F. Due to its small size, the upper octave key has to be placed in the mouthpiece.
Split into simpler sentences: It is pitched in B, one octave above the soprano saxophone. The keywork only extends to a written high E (rather than F like most saxophones) and the upper octave key has to be placed in the mouthpiece.