The precision pickup is designed specifically for orchestra and band instruments for improving acoustic tuning.  For string instruments (violin, viola, cello, and bass), the pickup can be clipped onto the bridge to pick up the sound of the instrument for tuning.  For band instruments, the pickup can also be clipped onto any part of the instrument to pick up sound.  For guitars, the contact microphone can be clipped onto the scroll.  A pickup is better in transmitting sound into the tuner than a built-in mic that always comes with a tuner.  This is because a mic is more likely to pick up background noise that causes interference with the sound from the instrument.  This pickup comes with proper cushion so it will not damage the finish on the instrument.  It also has a wide 1" clip range.  This allows the pickup to clip onto any part of the instrument that is as thick as 1".