NW-S774K/WI

The NW-S774K/WI is a tenth-generation S Series Walkman with 8 GB storage supporting MP3, WMA, AAC, and WAV files. It uses a 42-hour lithium-ion battery with speaker output, WM-PORT, video and photo playback, and Clear Phase. A speaker accessory was bundled. It matched the slim tenth-generation S refinements.

Another presentation branch of the same S774K platform, carrying the same overall meaning as the other S774 variants. The underlying story is still the same: Sony trying to preserve the compact classic Walkman by carefully updating it instead of abandoning it.