FecPecu Music Player, 8GB Bluetooth MP3 Player Hi-Fi Sound 70 Hours Playback, Portable Audio Player with FM Radio, Recording Function Build-in Speaker Expandable Up to 32GB (F281blue) BLUETOOTH FUNCTION: Needn't to insert the headphone or speaker, you can enjoy favorite music and listen to FM radio with the Bluetooth mp3 player. It supports bluetooth version over 3.0 and below 4.1, not supports V4.1. LONG BATTERY LIFE: 70 hours playback's battery life, and only need to charge for 3-4 hours. You can charge it in computer or the general charger which output is "5V, 0.5-1A" ONE KEY TO LOCK SCREEN: With the lock screen button, you needn't pain for the button being pressed by accident. Lock the screen, only need to press one key EASY TO SHUFFLE And BUILD IN SPEAKER: Shuffle favorite songs in any folder or playlist which you selected, enjoy shuffle fun. With build-in speaker, you can enjoy music by speaker without inserting or connecting headphone EASY TO SYNC WITH SONGS: Clear lossless stereo sound, support audio formats: MP3, WMA, OGG, WAV, APE, FLAC, and ACELP (Not support Audible and WMA DRM directly)