Tips: 4GB Recorder = built-in 4GB recorder Display: 2.4 inch Screen resolution: 320x240 Music background playback: support Synchronization: support Play mode: repeat play, single play, all loop TF card function: supports up to 128GB memory card Variable speed playback: 8-speed shifting Video format resolution: 320x240 Loudspeaker: support Radio function: support, supports radio recording Alarm clock: support Stopwatch: support Text reading: supports format and bookmarks Battery: 500mAh polymer battery Recording function: supports MIC recording, format supports MP3 Playback time: up to 20 hours of audio playback in headphone screen saver mode; video playback lasts 35 hours Language: English, Russian, Japanese, Korean, French, German, Turkish, Italian, Dutch, Portuguese, Spanish, Swedish, Danish, Polish, Thai, Hungarian, Romanian, Arabic, Greek, Indonesian, and other languages from over 20 countries Audio formats: APE, AAC, FLAC, MP3, WMA, OGG Important Notice for Bluetooth: 1. Can only connect to Bluetooth earphones or Bluetooth speakers, not to mobile phones or computers 2. Cannot listen to Radio via Bluetooth; please use an earphone to listen to radio 3. Not for data transmission 4. To use Bluetooth, use this device to search for your Bluetooth device, such as Bluetooth earphones, then select "play all music" Color: Black Material: Metal Size: 69 x 49.5 x 12.5 mm Package Contents: 1 x Music Player 1 x USB Cable 1 x English Instruction Manual Note: The package includes only the items listed above; other products are not included Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error is allowed within +/- 13 cm