Astell&Kern AK100 Mastering Quality Sound (MQS) Portable System High-resolution audio playback support up to 24bit/192kHz; Natively supports FLAC, OGG, WMA, MP3, WAV, APE, AAC & ALAC (.M4A), AIFF (.AIF), DSD64 (.DSF & .DFF) Integrated Wolfson WM8740 high-performance DAC; can be used as an external S-PDIF & USB DAC 2.4" capacitive 16MM IPS touchscreen (320x240); Bluetooth 3.0 supported Dual MicroSD Memory Card slots (32GB support in each slot); 32GB of internal flash memory; total memory space of 96GB 14 hours continuous audio playback