Sony Japan has unveiled an update to its A-Series line of Walkman MP3 players - the NW-A840. It joins the B-, E- X- and S-series players, but offers storage capacities of up to 64GB and a 2.8-inch WQVGA OLED display.

It has a thickness of 7.2mm, and - in a first for Sony's Walkman players - offers a TV-out slot that can pump out 720 x 480 video to an external display. It also has an S-Master digital amp, FM radio, digital noise cancelling and comes as standard with some rather nice MDR-EX300SL earphones.

Sony hasn't included the Wi-Fi or touchscreen that are present on the X-series in this model, but it does have niceties like drag-and-drop auto-converting video transfer, DSEE, and lyric display on the player. It appears to support MP3, WMA, AAC, HE-AAC, ATRAC, ATRAC AL, and PCM/WAV formats for audio, and AVC (H2.64), MPEG-4 and WMV video.

Battery life looks to be 29 hours of audio and 9 hours of video, but there's no indication yet of a release outside of Japan for this player. When we hear more, we'll be sure to let you know.