Tips:4GB Recorder=built-in 4gb recorders Display:2.4 inch Screen resolution:320x240 Music background playback:support 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 resolution 320x240 loudspeaker:support Radio function:support.Supporting Recording Radio Alarm clock:support Stopwatch:support Text reading: 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//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" Colour:Black Material:Metal Size:69x49.5x12.5mm Package Contents: 1 * Music Player 1 * USB Cable 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.