The Yamaha PSS-190 is a portable keyboard synthesizer released in the late 1980s. It was used by many professional musicians, including the likes of Depeche Mode, The Cure, and The Smiths. The PSS-190 is a monophonic synthesizer with a built-in sequencer and a variety of sound-shaping features. It has a two-octave keyboard, a built-in speaker, and a headphone jack. It also has a built-in arpeggiator, a pitch-bend wheel, and a variety of sound-shaping controls. The PSS-190 is a great choice for those looking for a vintage synth sound.