The Behringer MonoPoly 4-voice Analog Synthesizer is a powerful instrument with 37 semi-weighted keys and a variety of features that make it perfect for creating unique sounds. Its analog circuitry produces warm, rich tones that are perfect for a variety of musical genres. With one pedal input, you can easily add expression to your playing. This synthesizer is also equipped with a variety of controls, including the ability to adjust the oscillators, filters, envelopes, and more. It is a great choice for both beginners and experienced musicians looking to expand their sound.