Harmonium, Scale Changer, Folding Deluxe, 5 drones and 4 stops. Keyboard pops up, store in locked-down position for travel. Mechanical coupler (plays 2 octaves with one stroke). Keyboard slides to change scale. Integral bellows, dozens of sound combinatio

Deluxe, 5 drones and 4 stops. Keyboard pops up, store in locked-down position for travel. Mechanical coupler (plays 2 octaves with one stroke). Keyboard slides to change scale. Integral bellows, dozens of sound combinations. Finish color and decoration style may vary from photo. The Harmoniums are tuned to A = 440 (Hz) within 5-8 cents; rarely are they off by 10 cents. A cent is a unit of measuring intervals in music. Each half step (semitone) is made up of 100 cents. The 440 (Hz) represents the frequency of sound wave for the A note. If you double the frequency, you play the A an octave higher. Made in India.