The Yamaha Portatone PSR-540 is a medium-sized electronic keyboard with 61 keys, designed for synthesizer action. Manufactured in 2000, this black keyboard features built-in speaker, flash memory, USB compatibility, and a mic input. As a reliable instrument from Yamaha, it offers a range of features for musicians looking for a portable and versatile keyboard for practice or performance. This keyboard is amazing. I don't play, but there's not much this keyboard doesn't do. It comes with the adaptor. No manual or box. What you see is what you get. Comes used in very nice shape. It all has been tested and works great. AWESOME KEYBOARD!!!
eBay