The Sony WM-F35 is a portable cassette player released by Sony in the late 1980s. It features a slim design with a built-in cassette deck and headphones. The player is powered by two AA batteries and offers standard playback functions like play, stop, fast forward, and rewind. It also includes an AM/FM radio tuner with manual tuning and a telescopic antenna. The WM-F35 does not have any advanced features or high-fidelity capabilities.