Vintage Yamaha porto sound Beautiful vintage Yamaha Portasound PS - 300 Works well, everything works properly, is still fine after all of those years. Very suitable to take on the road, runs on battery and adapter. Cool features on this small keyboard from the early 1980s. Like a small transposer button, arpeggiator, accompaniment variations, as well as independent volume adjustments for bass, rhythm and arpeggio, among other things. Specifications: Year of publication: 1982 Keyboard: 37 keys ROM: 8 sounds, 10 rhythms Effects: sustain, delayed vibrato Power consumption: 2, 3 watts Dimensions: 543 mm x 152 mm x 43 mm Weight: 1.4 excluding batteries This keyboard has built-in 1.4 watt mono speaker(s). Batteries: C x 6 Signs of wear as may be expected from its age and use. Will be shipped registered.