For sale is a vintage 1986 Yamaha Portatone PSR-31 keyboard. This electronic keyboard features 61 keys and a range of built-in effects, including an auto bass function. It also has a built-in speaker, mic input, and can be powered by batteries or a power supply. The keyboard is in good working order and comes in black. Ideal for beginners, this Yamaha keyboard was manufactured in Japan and is a great addition to any musician's collection. The AC adapter this unit comes with is not the original.
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