ONN W6 MP3 Dark Blue Bluetooth MP3 Player Sport Music MP3 MP4 Player Built-in lithium battery 450mah, Rechargeable Battery Get up to 10 hours of music playback, recording up to 100 hours on a single charge with Bluetooth Function, you can play the music through Bluetooth speaker or Bluetooth headset RKnano chip,perfect sound quality ,It has various playing modes,8 GB memory capacity,supports up to 16 GB Micro SD Card Lossless acoustics; support multiple music formats: MP3, WMA, WMA, OGG, APE, FLAC, WAV, AAC-LC. support FM Radio/pedometer/time display