The Sony WM-FX163 is a compact personal cassette player designed for on-the-go listening. This portable device features an FM/AM tuner, enabling users to enjoy a wide variety of radio stations along with cassette playback. Its design incorporates a built-in speaker, which allows users to share music without the need for headphones. The unit is powered by two AA batteries, providing a decent playback time, making it suitable for extended use. The cassette deck supports normal, chrome, and metal tapes, ensuring versatility for different recording mediums. The device also features a belt clip for convenient portability. Additional functionalities include a headphone jack, volume control, and tuning controls. The construction often features a durable plastic casing, offering protection and lightness for easy transport.