Document Version: 1.0 Product Firmware Version: v2.1 (as of release) Classification: User Guide / Technical Reference 1. Introduction The XDUOO X2S is a compact, high-fidelity portable audio player designed for lossless music playback and USB Digital-to-Analog Converter (DAC) functionality. It features a physical button interface, support for common lossless formats, and a dedicated line-out mode for external amplifiers.
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