Product Features: * Ultra-high-resolution playback * DAC & Amplifier section and CPU section are completely separated, with the switching power supply circuit and audio circuit placed far apart. * Equipped with a 2.5mm 4-pole terminal, supporting balanced connections. * Compatible with Google Play. * Expandable up to a total of 432GB. Condition: * Purchased new from e-earphone several years ago. Initialized after confirming operation. * No missing items. Includes a dedicated case as a bonus. * A protective film was applied at the time of purchase, so there are no scratches on the LCD. * The exterior has scratches on areas not covered by the dedicated case.