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MillSO USB to 3.5mm Audio Jack Adapter, Sapphire Blue TRRS USB to AUX Audio Jack External Stereo Sound Card for Headphone, Speaker, PS4, PS5, PC, Laptop, Desktops - 1 Feet
MillSO

MillSO USB to 3.5mm Audio Jack Adapter

Bottom line: The MillSO USB to 3.5mm Audio Jack Adapter ($7.19 on Amazon as of 2026-10-06): Single TRRS 4-pole CTIA jack handles headphone audio and mic input together; main trade-off: output only: USB-to-3.5mm direction, so it will not capture line-in audio.

$7.19

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Buy on Amazon — $7.19 Compare to similar sound cards

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Single TRRS 4-pole CTIA jack handles headphone audio and mic input together
  • ✓ Driver-free plug and play, USB bus-powered with no wall adapter needed
  • ✓ Works across Windows XP through 10, macOS, Linux, Chromebook and Raspberry Pi
  • ✓ Sapphire blue metal housing over shielded 3-core enameled copper, not bare plastic

Cons

  • ✗ Output only: USB-to-3.5mm direction, so it will not capture line-in audio
  • ✗ Not compatible with iOS standard headphones, TVs, amplifiers, car decks or PS3
  • ✗ 1-foot cable is too short to reach a floor-standing tower from a desk headset
  • ✗ Requires a 4-pole CTIA plug, so OMTP-wired and 3-pole headsets may misbehave

Manufacturer description

The MillSO USB to 3.5mm Audio Jack Adapter solves a specific problem: your PC, laptop, or PS5 has USB ports to spare but no working headset jack. This external stereo sound card converts a single USB port into a 4-pole CTIA TRRS aux port, so one combo connector carries both headphone audio and microphone input at the same time. It is driver-free and bus-powered, so you plug it in and Windows 10 through XP, macOS, Linux, Chromebook, Surface Pro, or Raspberry Pi recognizes it without a setup step or a wall adapter. A built-in decoding chipset handles the signal conversion, and the sapphire…

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SpecPicks Verdict

SpecPicks scored MillSO USB to 3.5mm Audio Jack Adapter using a rating × review-volume × price-fit model applied to published specs and reviews across the sound cards category. MillSO's sound cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for sound cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will this work with my PS5 controller or console?

MillSO lists PS4 and PS5 among supported platforms, along with PC, laptop, and desktop USB ports. PS3 is explicitly not supported.

Do I need to install a driver?

No. The adapter is driver-free plug and play and draws power over the USB bus, so there is no download and no external power supply.

Can I use this to record audio into my PC from a 3.5mm source?

No. Transmission is unidirectional: the USB side is output only, so audio moves from the USB port to the 3.5mm jack and not the reverse.

Will my headset microphone work through it?

Yes, if your headset uses a 4-pole CTIA TRRS plug. The single combo jack carries stereo listening and mic speaking together.

How long is the cable, and will it reach my desktop?

It is 1 foot. That keeps it clear of adjacent USB devices but expect to need an extension for a tower placed on the floor.

Key Features

  • MillSO USB to 3.5mm jack audio adapter ideal to connect a TRRS 4-pole CTIA 3.5mm headset, TRRS mic or speaker to PC via USB interface. One combo interface support stereo sound listening + speaking, dual functions. Easily add a 3.5mm TRRS aux port for your devices, or use it as a replacement for a failed 3.5mm to USB audio adapter. (Unidirectional audio transmission: this USB port is output, not input. Audio can only transfer from USB port to 3.5mm port).
  • Compatibility: This USB to aux adapter fits various platforms and systems, Windows 10/8.1/8/7/Vista/XP, OS X, Linux, Google Chromebook, Windows Surface 3 pro, Raspberry Pi, etc. Convert USB port of PC, Laptop, Desktop, PS4... to a TRRS 4-pin audio jack, for connecting 3.5mm headset or speakers. (NOT compatible for IOS standard headphones, TV, amplifier, car, PS3).
  • Driver Free, Plug & Play: Easy to set up, no driver required, just plug and play! USB bus-powered, no external power required. Compact body size and 1-feet-more-length design make sure you will not interfere with other devices when using other USB ports. Perfect for carrying this 3.5mm to USB adapter in a pocket to the office, conference room or at home.
  • Premium Materials: Built-in smart Chipset for high-speed audio signal decoding and offer a full and delicate tone, highly restored quality sound. Robust Sapphire Blue Metal Housing ensures a wear-resistant, anti-corrosion, solid protection, and charming out looking. This USB to audio jack adapter tightly combined 20 Strands of three Cores, enameled copper, soft and durable PVC covers. Its high-density shielding protection ensures high stability sound transmission and a soft touch.
  • What You Will Get: MillSO offers 24*7 customer service and technical support for our 3.5mm audio jack to USB external sound card, to ensure your pleasing shopping experience. If you encounter any quality trouble or compatibility issues, please let us know.

Full Specifications

BrandMillSO
PlatformLinux, PlayStation 4, Windows 10
Audio Output ModeStereo
Compatible DevicesPC
Hardware InterfaceUSB
Full listing titleMillSO USB to 3.5mm Audio Jack Adapter, Sapphire Blue TRRS USB to AUX Audio Jack External Stereo Sound Card for Headphone, Speaker, PS4, PS5, PC, Laptop, Desktops - 1 Feet

Ready to buy?

MillSO USB to 3.5mm Audio Jack Adapter, Sapphire Blue TRRS USB to AUX Audio Jack External Stereo Sound Card for Headphone, Speaker, PS4, PS5, PC, Laptop, Desktops - 1 Feet is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $7.19

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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MillSO USB to 3.5mm Audio Jack Adapter, Sapphire Blue TRRS USB to AUX Audio Jack External Stereo Sound Card for Headphone, Speaker, PS4, PS5, PC, Laptop, Desktops - 1 Feet
$7.19
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