Product description    The Starting Point of Music: AK Jr  ? Ultra Slim & Light 8.9 mm Aluminum Body Design ? Single Wolfson WM8740 DAC ? 3.1 Inch WQVGA (240 x 400) LCD Touch Screen ? 3.5mm Single Ended Audio Output ? 64GB of Internal Flash Memory + microSD Memory Card Slot (Up to 200GB) ? DSD64 (1bit 2.8MHz) Playback Supported， Stereo Through DoP (DSD to PCM conversion) ? USB DAC feature