Colorfly Pocket Hi-fi C4 Hi Resolution Portable Audio Player 32 Gigabytes with Micro-SD expansion slot. Case made from North American black walnut. MP3: 32kbps-320kbps WMA: Maximum 24 bit/192khz APE: normal compression FLAC: Maximum 24 bit/192khz Play Time: Approximately 7 hours, depending on the sampling rate.