Memory description: 8G= built-in 8G 16G= built-in 16G 32G = built-in 16G + 32G TF card 40G = built-in 8G + 32G TF card 64G = built-in 8G + 64G TF card 128G = built-in 16G +128G TF card ​Body: magnesium alloy body Display: 2.4 inch Screen resolution: 320*240 Dimensions: 107*48*0.8mm Memory: 8G Bluetooth version: 4.1 Built-in Speaker：yes Music background playback: support LRC lyrics synchronization: support A-B repeat: support Play mode: repeat play, single play, all loop TF card function: support max 128G memory card Variable speed playback: 8 times shifting Video format AVI resolution 320*240。Video needs to be converted into video format through video converter. We can provide video converter. loudspeaker: support Radio function: support Alarm clock: support Stopwatch: support Text reading: TXT format, support bookmarks Battery: 500mA polymer battery Recording function: support MIC recording, format supports MP3 Life time: 65-80 hours of song playback in the headphone screen saver state. The video plays for 9 hours. Language: Support 28 national languages such as Russia, English, German, Italian, Hebrew, Japanese, Korean, Spanish, French, Greek, Czech, Danish, Hungarian, Dutch, Norwegian, Portuguese, polish, etc. Audio format: APE, AAC, FLAC, MP3, WMA, OGG. Package Including: 1x MP3 Player 1x Earphone 1x USB Cable 1x User Manual