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UPGRADE YOUR HOME STEREO - DS500 is an audiophile premium HiFi Bluetooth audio adapter that gives any vintage home stereo, AV receiver or powered speakers high definition Bluetooth connectivity. Plug and play, in a few seconds, it streams high-quality music from your phone, PC or any other music player with Bluetooth to any of your music systems. Digital audio quality: Bluetooth 5.1 and audiophile DAC chips. DS500 Bluetooth receiver adopts Qualcomm QCC5125 Bluetooth chip and ES9018K2M chip, delivers stable Bluetooth connection and a performance level that will satisfy the most demanding audio enthusiasts. BRILLIANT WIRELESS AUDIO: With support for the state-of-the-art Sony LDAC audio codec, Qualcomm aptX HD, aptX Low Latency, aptX and AAC decoding, DS500 adds highest quality Bluetooth audio to any home stereo system. VERSATILE AND STABLE CONNECTIVITY: With analogue RCA, digital optical and digital coaxial outputs, the DS500 is perfectly compatible with all types of audio systems for true high-resolution audio. With an external booster antenna to extend the wireless range to over 30m for a stable wireless connection. Volume Control & EQ Mode Press +/- the button to adjust the volume. In Bluetooth connection mode, supports EQ mode. With the EQ mode, you can adjust the music style as you like.