Battery Life: 30hrs for listening / 6hrs for watching. Battery Type: Rechargeable Lithium Ion. Brand: Sony. Built in Speakers: Yes. Built in Wi-Fi: No. Built-in Bluetooth For Wireless Streaming: Yes. Built-in Camera: No. Built-in Microphone: Yes. Bulit in Radio: FM. Card Slot: None. Card Slot Supports Hc: No. Case Included: No. Colour: Black. Colour Screen: Yes. Docking Station Included: No. Earphones Included: Yes. File Compatibility: MP3,WMA,DRM,MP4,WMV, MP3/AAC, Video: AVC Baseline/MPEG4; Audio: MP3, ATRAC, AAC, WMA; Photo: JPEG. Headphones Included: Yes. Horizontal Screen Resolution: 240. Hours of Video Playback: 4.5. LCD Screen Size: 2". Mains Charger Included: Yes. Plays Aac Files: Yes. Plays Amv Files: Yes. Plays Atrac Files: Yes. Plays Divx Files: No. Plays Flv Files: No. Plays H264 Files: Yes. Plays MP3 Files: Yes. Plays Mp4 Files: Yes. Plays Mp4a Files: Yes. Plays Mp4p Files: Yes. Plays Mpeg-1 Files: Yes. Plays Mpeg-2 Files: Yes. Plays Ogg Files: Yes. Plays Quicktime Mov Files: Yes. Plays Wav Files: Yes. Plays Wma Files: Yes. Software Included: Yes. Storage Capacity: 4GB. Support Id3 Tag Display: Yes. Type of Screen: LCD. Type of Storage: Internal Flash Memory. Typical Number of Songs: 1000. USB Cable Included: Yes. USB Socket: Standard Full Size "Type A". Vertical Screen Resolution: 320. View Photos or Videos: Photos, Videos.