The Sony WM-AF54 is a compact cassette player that was part of Sony's Walkman lineup, specifically designed for both audio playback and FM radio functionality. It is lightweight and portable, making it ideal for on-the-go listening. The device features an auto-reverse function, allowing continuous playback of tapes without needing to manually flip them. It comes equipped with a built-in stereo microphone for recording and offers features such as a 2-digit tape counter and a headphone jack for personal listening. The design includes an easy-to-read LCD display for tracking playback time and radio frequency tuning. The WM-AF54 is powered by batteries, making it suitable for use in various environments without the need for an outlet. Its compact size and user-friendly interface make it a convenient option for cassette enthusiasts.