The clip-on Center Pitch CP10 Chromatic Tuner is small enough for band and orchestra players to attach directly onto the instruments. The CP10 is also a perfect tuner for marching band players or concert musicians. It has the traditional Center Pitch arrows display and includes both a tuner and a metronome in its compact case. When your instrument is in tune the CP10 tuner's red backlight changes to a bright green. Center Pitch includes a transposition option (moving a collection of notes up or down in pitch by a constant interval) for C B-flat E-flat F and G instruments.