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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want to split one USB-C audio signal into two separate 3.5mm headphone jacks so two people can listen to the same thing, choose JSAUX USB C; if you need to extend an existing 3.5mm headphone or headset cable by a long run while keeping both audio and mic working, choose Ugreen Headphone Extension Cable.
• JSAUX USB C — biggest strength: turns a single USB-C port into two 3.5mm female outputs with a built-in Realtek DAC, so two headsets share one source at 16bit/48kHz.
• JSAUX USB C — biggest trade-off: it only works with USB-C devices, only one of its two jacks carries mic and volume control, and it needs a source that outputs audio over USB-C in the first place.
• Ugreen Headphone Extension Cable — biggest strength: a 10FT four-pole TRRS extension that keeps both listening and microphone signals alive, so headsets and gaming mics still work after the extension.
• Ugreen Headphone Extension Cable — biggest trade-off: it extends an existing 3.5mm signal rather than converting anything — it's useless on a phone or laptop with no 3.5mm jack, and 10FT is a lot of slack for desk use.
• Pick JSAUX USB C if you and someone else want to watch or listen together off one USB-C device.
• Pick Ugreen Headphone Extension Cable if your device already has a 3.5mm jack and you just need more reach without losing the mic.
This little adapter solves a very specific problem: one USB-C port, two listeners. It's a Y splitter, not an extension cable. The USB-C male end plugs into your phone, tablet or laptop, and the two 3.5mm female jacks let you hand a second pair of wired headphones to whoever is sitting next to you. On a flight, on a train, or on the couch with a shared movie, that's genuinely useful in a way a plain extension cable never is.
The engineering detail I like is the built-in Realtek DAC chip. Digital audio coming out of a USB-C port has to be converted to analog before a normal pair of headphones can play it, and JSAUX handles that conversion internally, decoding at 16bit/48kHz. In my opinion that spec is more than adequate for streaming, gaming audio and everyday music — you're not losing anything obvious in a sharing scenario. The cable itself is 28CM, short enough to drop in a pocket, and the braided nylon jacket with a proper strain relief is a real step up from the plain PVC jackets you usually see at this size. JSAUX also states the cable survives 10000+ bending tests, which speaks to the kind of abuse a dongle like this takes in a bag.
Who should skip it? Anyone whose device has no USB-C port, anyone with an iPhone using Lightning, and anyone who just wants a longer cable. This is a sharing adapter, not a reach extender. Compatibility is broad — iPhone 15/16 series, Galaxy S24/S23/S22/S21/S20, Note 20/10, Pixel 3 through 7 Pro, iPad Pro and Air, MacBook Pro 2021–2023 — but it lives and dies by that USB-C requirement.
Ugreen Headphone Extension Cable: Who It's For
The Ugreen Headphone Extension Cable is the opposite kind of product, and that's exactly why the comparison is interesting. It doesn't convert or split anything. It takes an existing 3.5mm signal and carries it further — 10 feet further, to be precise — without killing the microphone channel. That's the headline: it's a four-pole TRRS cable, meaning it passes audio and mic. A standard TRS extension usually only handles listening, which is why people get confused when their headset mic goes dead after adding an extender. Ugreen sidesteps that entirely.
The construction is aimed at longevity. The connectors are 24K gold-plated and the conductor is oxygen-free copper, which Ugreen says is for maximum conductivity and stable sound quality across the longer run. The outer jacket is braided and designed to stay tangle-free, with a metal housing and a flat cable profile. Ten feet of flat, braided cable is a lot easier to live with than ten feet of round rubber cable coiled on the floor.
The everyday use cases are the ones that matter. If you've got a desktop PC across the room from your chair, or a TV where you want to sit back on the sofa with wired headphones, 10FT changes the whole experience. Gamers with a 3.5mm headset get the mic channel intact, so voice chat still works. It's also a cheap way to protect a port you can't easily replace — Ugreen frames it as a sacrificial cable, so if anything wears out from constant plugging and unplugging, it's the cable, not the jack on your laptop or console.
Who should skip it? Anyone whose phone or laptop has no 3.5mm jack. If your device is USB-C only, this cable has nothing to plug into — you need an adapter like the JSAUX, not an extension. And if you only need an extra foot or two on a desk, 10FT of slack is more annoyance than help.
• Two people, one device → JSAUX USB C. It splits one USB-C output into two 3.5mm jacks; Ugreen can't split anything.
• Longer reach → Ugreen Headphone Extension Cable. 10FT vs a 28CM adapter — there's no contest.
• Keeping the microphone working → Ugreen Headphone Extension Cable. Its four-pole TRRS design carries both audio and mic; on the JSAUX only one jack supports mic input.
• USB-C-only phone or tablet → JSAUX USB C. Ugreen needs a 3.5mm port to exist in the first place.
• Desktop PC or TV with a 3.5mm jack → Ugreen Headphone Extension Cable. This is the exact scenario a 10FT extender was built for.
• Travel and pocket carry → JSAUX USB C. At 28CM with a braided jacket, it disappears into a bag; a 10FT cable doesn't.
• Port protection → Ugreen Headphone Extension Cable. Leaving the extender plugged in means your device's own jack barely gets touched.
• Shared listening without a second adapter → JSAUX USB C. The Realtek DAC and dual outputs make it a self-contained solution.
In my opinion these two products barely compete — they solve different problems, and the right answer is whichever problem you actually have. If I had to pick one for the most common buyer walking in off a search, I'd take the Ugreen Headphone Extension Cable. Devices with a 3.5mm jack are still everywhere, headsets with mics are common, and a durable 10FT TRRS run that keeps the mic alive is useful in more rooms of more homes. I'd only steer you to the JSAUX USB C if your priority is genuinely sharing audio with a second person off a USB-C device — that's a job nothing else here can do. Check the current price on Amazon before deciding, since both are inexpensive enough that owning both isn't unreasonable.
Yes. It's a four-pole TRRS cable, so it passes both the audio and microphone signals, unlike a standard TRS extender that drops the mic. It's a common fix for headsets whose mic stops working after adding an extension.
No. Only one of the two 3.5mm jacks supports volume control, microphone and listening — the other is listening only. It's built for two people listening, not two people talking.
Not on its own. It needs a device with a 3.5mm jack. If your phone is USB-C only, you'd need a USB-C audio adapter instead — which is exactly what the JSAUX is.
JSAUX states the Realtek DAC decodes at 16bit/48kHz and transmits without quality loss to both connected headsets. Based on the specs, both listeners get the same signal rather than a degraded one.
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