Astell & Kern AK240 High Resolution DAP with Beyerdynamic AK-T5P Limited Edition Balanced Headphones, ProStudio Wall Charger and Optical Audio Connection Kit Astell & Kern AK240 Mastering Quality Digital Music Player with Astell&Kern T5P Headphones with Balanced Connector by Beyerdynamic, Optical Audio Connection Cable with ProStudio High Speed USB Wall Charger Kit. 256GB Internal Storage Expandable up to 384GB Direct Stream Digital (DSD) offers more dynamic range Minerva, Hand Made Italian Leather case Included.