This is a special electromagnetic tuner to accompany the Chromaplane.
When placed over the instrument, the tuner will silently listen for electromagnetic fields emitted from the Chromaplane’s surface and display information about the detected note.
The turner’s LED display shows the cents off, closest chromatic note, and current octave.
Using the turner, you can silently tune the Chromaplane without having to listen to the instrument or pass its signal through additional gear.
The tuner runs off a single coin cell battery (CR2032), which comes included.
The tuner is also designed to interface well with its accompanying website that can be found here. On the website, you can browse through a library of tunings for the instrument.