The Sequential PRO-ONE 37 key Monophonic Synthesizer is a high-quality keyboard synthesiser designed by Sequential Circuits. With its analogue sound capabilities, this unit offers a wide range of creative possibilities for musicians and producers. It features a Turbo CPU and Kenton MIDI for seamless connectivity and functionality, along with various input/output ports including USB, MIDI, and TRS. The PRO-ONE also includes useful features such as pitch and modulation wheels, making it a versatile and powerful tool for generating unique and dynamic sounds in a musical setting.