FecPecu Lossless Sound 8GB MP3 Player Hi-Fi 72 Hours Playback Music Player with Speaker Expandable Up to 64GB (Blue) 72 hours playbacks 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 The memory card slot can support 64GB, so can store more music or other files Clear lossless stereo sound, support audio formats: MP3, WMA, OGG, WAV, APE, FLAC, and ACELP Shuffle favorite songs in any folder or playlist which you selected, enjoy shuffle fun The mp3 player build-in speaker, enjoy lossless sound without inserting the headphone