The KEYSION dongle uses dual CS43198 DAC chips and supports up to 768kHz PCM and DSD256 while offering both 3.5mm and 4.4mm headphone outputs plus adjustable EQ and a built-in headphone amplifier. For portable Hi-Res playback and device compatibility (USB-C, iOS/Android), it delivers the expected high-resolution feature set; evaluate fit and noise floor on your headphones before buying.
For portable-audio listeners who want dual CS43198 DACs, 768kHz/DSD256 support, and both 3.5/4.4 outputs; avoid if you need vetted noise-floor measurements or documented reliability data.
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