In the words of Walrus Audio:

Arguably the most important pedal on your board, the CanvasTunerensures that your instrument is ready to sound its best with the perfect meld of versatility and precision. Packaged in the same tough-as-nails, tour-ready enclosure as all Walrus pedals, theTunerfeatures a bright 2.8 TFT LCD display that can be viewed under just about any stage lighting conditions,multiple screen orientations,0.1 cent accuracy, buffered or true bypass options and more. The CanvasTunerensures that you have the most accurate brush to paint your sonic picture.