This Yamaha PortaSound PSS-100 is a vintage portable keyboard synthesizer featuring 49 keys and a variety of built-in sounds and rhythms. It is compact and lightweight, making it ideal for beginners or collectors interested in retro electronic instruments. The keyboard shows signs of wear consistent with age, including some scuffs and scratches on the casing, but all keys appear intact. The battery compartment is open with some visible wear, does not have any cords, therefore it has not been tested.