ARN B4 3-4 for 4-string bass shows you triads and tetrads of any musical scale in an innovative way. Perfect for studying and applying chords and harmonizations. You can move the tonic anywhere on the fretboard. Thanks to the dedicated Circle of Fifths for each scale, you can easily create harmonious chord progressions. Choose between four neck positions, 2 for right-handed and 2 for left-handed players. Use FOCUS to zoom in on a specific part of the fretboard. Want to experiment? Change the tuning and instantly get the correct scale degrees for the scale you're interested in, with over 10 preset tunings.