Astell & Kern AK240 Mastering Quality Sound Dual DAC (Gun Metal) with 128GB MicroSD, ExtremeAudio Wall Charger, USB Docking Station and Optical Audio Connection Kit Minerva, Hand Made Italian Leather case Included. Astell & Kern AK240 Mastering Quality Digital Music Player with SanDisk 128GB MicroSD card, PEM12 USB Docking/Charging Station, Optical Audio Connection Cable with Extreme Audio High Speed USB Wall Charger Kit. Direct Stream Digital (DSD) offers more dynamic range 256GB Internal Storage Expandable up to 384GB