Professional Quality Harmonium A440 Pitch – Checked At Dispatch Set Of 2 High Quality “SG Musical” Reeds: 1 Base + 1 Male = Rich Sound 3 1/2 Octaves, Total 42 Keys Coupler Function – For Even Richer Sound Instant Response Keyboard – No Lag Time Multi-Fold Bellows For Easy Pumping & Consistent Sustain Air Leaks Are Checked For Longer Sustain Portable Folding Box Type Full Wooden Top Cover Bright Nickeled Brass Knobs Glass Frame/Jaali On Keys Made With Dried Indian Wood – Kail & Mirindi (Indian Cedar) Tested Before Shipping: Sound, Keys, Tuning, Sustain, Finish Etc.