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Fosi Audio

Fosi Audio D2 USB-C DAC Dongle

Fosi Audio D2 USB-C DAC Dongle

  • Authorized Retailer
  • Free US Shipping $49+
  • 1-Year Warranty
  • 45-Day Returns
$18.99 USD
$18.99 USD
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Shipping calculated at checkout.

The Fosi Audio D2 is an aluminum USB-C to 3.5mm DAC/amp dongle built on the CX31993 chip, with headset microphone support passed through.

It's the everyday-carry answer to a phone with no headphone jack: small enough to leave attached to a laptop bag, and the mic support means gaming headsets and mic-equipped IEM cables still work for calls. Good as a first upgrade over a bundled adapter, or as the spare you keep in the other bag.

  • CX31993 DAC/amp chip
  • USB-C in, 3.5mm out, aluminum housing
  • Headset microphone support for calls and gaming

Authorized Fosi Audio retailer. Free US shipping over $49 and 45-day returns.

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Good to know

Frequently asked questions

Is this unit genuine?

Yes. TonePier is an authorized retailer — every unit comes from the brand or its official distributor, carries a valid serial number and is covered by the full manufacturer warranty.

How long does shipping take?

SKUs stocked in our US warehouse ship within 1–2 business days. Items shipped direct from our China hub typically arrive in 8–15 days with full tracking. The product page tells you which applies before you order.

What if it isn't for me?

You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.