AGPTEK A02S 16GB MP3 Player with FM Radio/Voice Recorder, 70 Hours Playback and Expandable Up to 128GB, Black LARGE MEMORY:16GB Internal Capacity for up to 4000 songs, supports up to 128GB Micro SD Card! (To avoid incompatibility, please use AGPTek Memory Card). 70 HOURS AUDIO PLAYBACK:only need to charge it for 3-4 hours. You can charge it in computer or with the general charger which output is "5V, 0.5-1A" HiFi-CLASS BIG SOUND: Loss-less Sound quality with Latest upgrade chip, Support Most Popular Audio formats:MP3(MP1,MP2,MP3),WMA,OGG,WAV,APE,FLAC,AAC-LC,ACELP.(Requirements for APE and Flac:8KHz-48KHz, 1000Kbgs) EASY OPREATION:Just drag and drop the music file or folder directly when connecting to computer, Shuffle favorite songs in any folder or playlist which you selected, Simply Sync playlists by Media Go(for free) on your computer,Works perfectly with Car via AUX port. (Additional male to male AUX cable is needed) PORTABLE FOR SPORT: Shock absorption surface and it only weights 1.1 oz. Smart but Big Music.