The Sony WM-FX221 is a portable cassette player that combines the classic cassette technology with radio functionality. It features a compact and lightweight design, making it easy to carry and ideal for on-the-go listening. The device is equipped with an FM/AM tuner, allowing users to enjoy both radio broadcasts and their favorite cassette tapes. The WM-FX221 typically includes a built-in speaker and a headphone jack for private listening. Additionally, it has controls for play, rewind, fast forward, and stop functions, along with a power button. The player operates on AA batteries, providing convenience and portability for users who enjoy vintage audio playback. The overall aesthetic is characterized by a streamlined design, often found in portable audio devices of its era, highlighting functionality and ease of use.