The Sony WM-F15 is a portable cassette player belonging to the Walkman series introduced by Sony. It features an AM/FM stereo radio and playback capabilities for cassette tapes. This model is designed for personal use with headphones and is recognized for its compact, portable design suitable for on-the-go audio listening. It typically includes functions such as play, stop, fast-forward, and rewind for tape operations, and tuning and volume controls for its radio functions.