Memory description: 8G= built-in 8G 16G = built-in 16G 40G = built-in 8G + 32G TF card 64G = built-in 8G + 64G TF card Body: Zinc alloy fuselage Display: 1.8 inch TFT Screen resolution: 126*160 Dimensions: 95*41*7.9mm Memory: 4G/8G Bluetooth function: Bluetooth 5.0. Support to connect Bluetooth headset and Bluetooth speaker. Music background playback: support LRC lyrics synchronization: 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 128*160 loudspeaker: support Radio function: support.Supporting Recording Radio 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: 20hours of song playback in the headphone screen saver state. The video plays for 3-5 hours. Language: English/Russian/Japanese/Korean/French/German/Turkish/Italian//Dutch/Portuguese/Spanish/Swedish/Czech/Danish/Polish/Thai/Hungarian/Romanian/Arabic/Greek/Indonesian and other languages of more than 20 countries. Audio format: 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. Can not listen to Radio via Bluetooth. Please listen to radio via an earphone. 3. Can not for data transmission. 4. How to use Bluetooth? Please use our device to search your Bluetooth devices, such as Bluetooth earphones. Then "play all the music" Product List: 1 X Music Player 1 X Manual 1 X USB Cable 1 X Headphone