Yamaha PSS-104

The Yamaha PSS-104 is a portable synthesizer keyboard released in the early 1980s. It was used by many popular musicians, including Michael Jackson, Herbie Hancock, and Prince. The PSS-104 is a monophonic synthesizer with a built-in speaker, and it features a 32-note keyboard, a built-in rhythm machine, and a built-in sequencer. It also has a built-in arpeggiator and a variety of sound effects. The PSS-104 is powered by four AA batteries and can be connected to an external amplifier or mixer.