4 GB (Built-in Memory), 1000 Songs, 1.8 oz., Audio Files: MP3, WAV, WMA, AAC. Video Files: MPEG-4, H.264. Display Size: 1.8 inch

Slim and stylish, the NWZ-S616F Walkman® Video MP3 player combines a powerful digital music player with a 1.8" QVGA LCD screen for hours of multimedia entertainment. Listen to your favorite songs, view videos and photographs or listen to your favorite radio stations. Weighing less than 2 ounces but with the capacity to store up to 15 hours of video or hundreds of photographs, the 4GB NWZ-S616F Walkman® Video MP3 player delivers everything you need to take your favorite entertainment with you.

16 GB (Built-in Memory), 4100 Songs, 3.46 oz., Audio Files: MP3, WMA, AAC, IMA ADPCM. Video Files: MPEG-4, MPEG-1, DivX, WMV, AVI,...

The 16GB X Series has enough storage capacity for 4,000 songs or 60 hours of video.The X Series offers unrivalled features and incredible audio and visual quality and supports a vast range of formats including MP3, WMA, LPCM, AAC, AVI, WMV and more so you can play a range of tracks and videos, whatever the source.The X Series also has a built in FM tuner so you can enjoy your favourite radio stations to on the move.The X Series is beautifully designed. It comes in a stunning graphite finish, with aluminium buttons and is built to feel slim yet solid. With a crystal clear OLED touchscreen, integrated noise-cancellation, built-in Wi-Fi for browsing the web or watching YouTube, and support for high-quality video, it's the ultimate digital media player.

4 GB (Built-in Memory), 1000 Songs, 0.92 oz., Audio Files: MP3, WMA, WMA (DRM).

Sony's NWZ-B143FB will fit into the palm of your hand, yet it's bursting at the seams with fabulous technology! The NWZ-B143FB includes a bass enhancer for sound; a Zapping mode so you can choose what you want to listen to; a Drag & Drop function allowing you to transfer data in a matter of seconds; a Dictaphone and an FM radio. What's more, the NWZ-B143FB boasts 4 GB of storage space and has a battery life for up to 18 hours of non-stop music.

8 GB (Built-in Memory), 2000 Songs, 1.9 oz., Audio Files: MP3, WMA, AAC, WMA (DRM). Video Files: H.264. Display Size: 2 inch