The Sony WM-F45 is a portable cassette player that was popular in the late 1980s and early 1990s. It is part of Sony's Walkman series, designed to offer music on the go. The device features a compact and lightweight design, making it easy to carry. It has a built-in FM/AM tuner, allowing users to listen to radio broadcasts alongside their cassette tapes. The WM-F45 is equipped with a headphone jack for personal listening and typically comes with a belt clip for convenience. The sound quality is decent for its time, with built-in speakers that provide an acceptable listening experience. It uses AA batteries, which makes it accessible for long-life playback. Many users appreciated its durable construction and user-friendly controls, which include simple play, rewind, fast forward, and stop buttons.