Memory description:8G= built-in 8G16G = built-in 16G32G = built-in 16G + 32G TF card40G = built-in 8G + 32G TF card64G = built-in 8G + 64G TF card80G = built-in16G + 64G TF card128G = built-in 16G + 128G TF card Body: Zinc alloy fuselageDisplay: 2.8 inch Screen resolution: 320*240Dimensions: 76*52*10mmMemory: 8G/16GBluetooth function: Bluetooth 5.0. Support to connect Bluetooth headset and Bluetooth speaker.Music background playback: supportLRC lyrics synchronization: supportPlay mode: repeat play, single play, all loopTF card function: support max 128G memory card Variable speed playback: 16 times shiftingVideo format AVI resolution 320*240.Ordinary video needs to be converted through a video converter. We can provide a video converter.loudspeaker: supportRadio function: support.Supporting Recording Radio.The radio must have headphones plugged in as an antenna.Pedometer: supportAlarm clock: supportStopwatch: supportText reading: TXT format, support bookmarksBattery: 500mA polymer batteryRecording function: support MIC recording, format supports MP3Life time: 20 hours 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/Hebrew/Dutch/Portuguese/Spanish/Swedish/Czech/Danish/Polish/Thai/Hungarian/Romanian/Arabic/Greek/Indonesian and other languages of more than 28 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 Player1 X Manual1 X USB Cable1 X Headphone