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Updated: 2026-09-18 · 7 min read · Independent comparison
• JSAUX 2-Pack biggest strength: a Smart DAC chip that converts digital audio to analog and supports up to 16Bit/48kHz, plus mic and volume control on many USB-C phones — and you get two of them.
• JSAUX 2-Pack biggest trade-off: it only works on USB-C devices with no 3.5mm jack, and it does not support the mic or volume controls on Apple EarPods, nor OMTP/TRS mic-only gear.
• Ugreen Headphone Extension Cable biggest strength: 10 feet of 4-pole TRRS cable, so it carries both listening and talking, with gold-plated connectors and a braided, tangle-free jacket.
• Ugreen Headphone Extension Cable biggest trade-off: it is a passive extension, not an adapter — it does nothing for a phone that has no 3.5mm port at all.
• Who each pick is for: JSAUX for USB-C phone and tablet owners who lost their jack; Ugreen for anyone with an existing 3.5mm port who just needs more reach.
The JSAUX 2-Pack is a USB-C to 3.5mm AUX adapter built around a Smart DAC chip. In plain terms, that chip takes the digital audio signal coming out of your phone or tablet and converts it into an analog signal your wired headphones can actually play. It supports up to 16Bit/48kHz sampling, which is the standard resolution for everyday listening, and the design is meant to keep the original character of your headphones rather than adding its own color. There is shielded enamel wire inside and metal-coated connectors, so the signal path stays stable with daily plugging and unplugging.
Where it earns its place is on phones that dropped the headphone jack. The compatibility list is long: iPhone 17 through iPhone 15 families, Galaxy S24 down through S20 and the Note line, Pixel 9 through 6, iPad Pro, iPad mini 6, MacBook, and a spread of Huawei and OnePlus models. If you have a USB-C device with no 3.5mm port, this is the bridge back to your wired headphones, a headset, or a speaker. Because function keys on the headphones can handle call, volume and pause on supported models, it behaves a lot like the jack you lost. The two-pack matters more than it sounds: one lives on your desk, one stays in your bag, and you stop swapping a tiny dongle between rooms.
The trade-offs are real and worth reading before you buy. This adapter is for USB-C devices without a headphone jack. If your phone already has a 3.5mm port, calling may not work through the adapter at all — JSAUX calls this out for some Galaxy models (S9, S8, Note 9, Note 8, S10) and iPad Pro. Apple EarPods with a 3.5mm plug won't give you mic or volume control here. And it only plays nice with CTIA wiring — OMTP, TS and TRS mic-only devices are not supported. The relief-strain design is rated for 15000+ bending tests, which speaks to the weak point on any dongle, and there's a one-year manufacturer warranty behind it. Skip it if you already have a jack, if you rely on EarPods controls, or if your gear uses OMTP wiring.
The Ugreen Headphone Extension Cable solves a completely different problem. It is a 10-foot, 4-pole TRRS male-to-female cable. That fourth pole is the whole point: a standard TRS extension only carries left and right audio, but this one carries the mic signal too, so you can talk as well as listen. If you've ever plugged a TRS extender into a gaming headset and watched your friends stop hearing you, this is the cable that fixes that.
The build is aimed at surviving daily life. The connectors are 24K gold-plated and the conductors are oxygen-free copper, a combination chosen for conductivity and to resist corrosion over time. The outer jacket is braided and flexible, which keeps it from turning into a knot in a drawer, and the housing is metal rather than molded plastic. Ugreen also frames it as port protection: leaving a cheap extension plugged into your TV, console or laptop means the wear and tear of constant plugging happens to the cable, not to the device's own jack. That's a genuinely sensible habit for anything with a port you can't easily replace.
Compatibility is broad because it's passive — anything with a 3.5mm port works: iPhone 6S and older, iPads, Galaxy S10 and back through S7, tablets, MP3 players, speakers, receivers, car stereos, and even card readers like Square or PayPal units. The natural fits are TVs, gaming consoles, desktop setups and car stereos where you want to sit back or move around while staying wired. What it won't do is create a jack that isn't there. If your phone is USB-C only, this cable has nothing to plug into — that's the JSAUX's job. It's also an indoor-oriented cable by design, so I wouldn't treat it as a rugged outdoor run.
Side-by-Side: Which Should You Choose?
• Best for a phone with no headphone jack → JSAUX 2-Pack. It's the only one of the two that adds a 3.5mm port to a USB-C device.
• Best for mic and voice chat → Ugreen Headphone Extension Cable. The 4-pole TRRS design carries the mic signal; a plain TRS extension would not.
• Best for keeping a wired headset on your phone → JSAUX 2-Pack. Mic, volume and pause work through the headphone's own controls on supported models.
• Best for TV, console or desktop reach → Ugreen Headphone Extension Cable. 10 feet of braided cable is built for exactly that distance.
• Best for protecting a hard-to-replace port → Ugreen Headphone Extension Cable. The extension takes the plugging wear instead of your device.
• Best for having a spare → JSAUX 2-Pack. Two adapters means one for the desk and one for the bag.
• Best for audio resolution claims → JSAUX 2-Pack. It specifies 16Bit/48kHz through its DAC; the Ugreen is a passive conductor with no conversion involved.
In my opinion, most people shopping this comparison should start by asking which problem they actually have. If your phone is a USB-C model with no headphone jack and you want your wired headphones back — with call and volume controls working on supported devices — I'd buy the JSAUX 2-Pack. The DAC does the conversion work, the compatibility list is enormous, and getting two means you're never hunting for the one dongle. I'd only steer you to the Ugreen Headphone Extension Cable if you already have a 3.5mm port and need distance plus mic support, in which case it's the better tool and the JSAUX is simply irrelevant to you. Neither is a compromise pick — they just answer different questions.
If you move between a desk setup and a bag, yes. Two adapters mean you stop unplugging and re-plugging the same tiny dongle, and you have a spare if one gets lost. The second unit is the practical part. Check the current price on Amazon to see how the pair compares to buying singles.
Yes, that's its main advantage over a standard extender. It's a 4-pole TRRS cable, so it carries the mic signal as well as left and right audio. A 3-pole TRS extension would only give you sound, not a working mic.
It may not. JSAUX specifically notes that calling can fail when the USB-C device already has a 3.5mm port, and lists models like the Galaxy S9, S8, Note 9, Note 8 and S10, plus iPad Pro, as affected. If you have a jack, the Ugreen extension is the more sensible buy.
The JSAUX converts digital to analog through a Smart DAC supporting up to 16Bit/48kHz, so it's handling the decoding that your headphones need. The Ugreen is passive: gold-plated connectors and oxygen-free copper are there to keep the signal clean over 10 feet rather than to improve it. Both are aimed at preserving what you already have, not upgrading it.
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