HIFIMAN Supermini High-Res Portable Player High performance within a stylish and compact 8.55mm design Battery life up to 22hrs Hi-fi Sound Quality but Small Size and Low Power Consumption Carefully crafted and CNC machined from a solid block of aluminum alloy Exquisite, Performance, Versatile: Mini in size, great in sound and easy to be driven, hence the name: SuperMini. Thinner and lighter than LCD screens, OLED can display deeper black levels and wide angle vision. Simplicity & Elegance: Simple to use user interface design without compromising on functionality