we offer Scale Changer Harmonium C/p-010. Special features: Scale display label : It helps you to change the scale without looking down at the changing knob.Coupling system :- This system provides you a unique facility. While you are playing a particular note the sound of the same note of lower octave will set it automatically.You canchange the scale as and when required.It is in the form of a locked suitcase, thus can easily be carried from one place to another.Minimum space occupied while keeping.Easy to preserve the instrument from dust, heat and light.