The Vintage Casio CT-648 61-Key Keyboard is a classic electronic keyboard with features such as Power Cord, Battery Powered Option, Built-in Effects, and a Speaker. This keyboard, manufactured in 1989 in Mexico, is a large black Casio CT-638 61-Key model that is still functional even with missing 3 dial knob caps. With its pulse code modulation and 35-inch length, this keyboard is a sought-after instrument for musicians looking for a reliable and versatile synth option.