Product Highlights: On-board antenna provides a transmission distance of approximately 50 meters in open space; no external antenna required. If installed in a metal enclosure to avoid signal shielding, an external antenna can be connected via the reserved IPEX antenna seat. Features a 12S output interface compatible with amplifiers supporting 12S input, and includes a button expansion interface for track navigation, play/pause control, and volume adjustment, offering strong expandability. Equipped with a TYPE-C USB interface for PC sound card connectivity or USB power supply. Includes a free acrylic enclosure and magnetic mounting posts for easy and secure installation. Utilizes QCC5125 + PCM5102A for high-quality o transmission and decoding, delivering clear sound with accurate dynamics and detail, smooth high frequencies, rich midrange, and powerful bass. High-performance specifications: dynamic range 112dB, signal-to-noise ratio 112dB, total harmonic distortion -93dB. Key components use high-quality capacitors with low dissipation factor and ESR, enhancing o performance across frequency ranges. Low leakage current helps reduce aging effects, while low ESR improves high-frequency response and dynamic speed. Temperature, voltage, and frequency variations may affect o performance; a good dissipation factor helps minimize these effects. Type: QCC5125 Material: Plastic Color: As shown Package Contents: 1 x o Decoder Board Note: Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3cm.