Sony just released its latest Walkman, the S540, in the US. The S540 features 2.4″ of viewing real estate and a pair of stereo speakers, so you can listen to your songs without headphones. An integrated microphone lets you record voice notes to yourself and you also get a built-in FM radio.
Battery life is about 42 hours with music playback on headphones, while video playback is 6.5 hours. It supports all of the popular audio file formats like AAC, MP3 and WMA. Video file formats include H.264, MPEG-4 and WMV.