WM-FS566

The WM-FS566 is a late sport Walkman in Sony's FS series released in 2004. It combined auto-reverse cassette playback and Mega Bass with a digital FM/AM tuner covering TV and weather bands inside a rugged, shock-resistant body powered by one AA battery. Supplied accessories includes a reflective hand strap, belt clip, and specialized sport ear-clip headphones built for active outdoor conditions.

Sony kept refining the sport lineup into the mid-2000s to maintain relevance for active listeners long after most consumers had moved on. This model targeted runners, hikers, and outdoor enthusiasts who required reliable radio and tape performance under motion, standing out as one of the final durable hybrids that extended the cassette format into demanding real-world use cases.