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Updated: 2026-09-27 · 6 min read · Independent comparison
• OONAISE biggest strength: it turns a 3.5mm headphone plug into something a USB-C device can accept, so older wired headphones and earbuds stay useful on newer phones, tablets and laptops.
• OONAISE biggest trade-off: it's a converter, not a splitter — it gives you exactly one output, and the manufacturer explicitly notes it may not suit iPhone, MacBook, iPad or Huawei Mate products.
• SAMZHE biggest strength: one male 3.5mm plug becomes two female outputs, letting two people share audio from a single jack, with 24K gold-plated connectors, oxygen-free copper wiring and triple shielding.
• SAMZHE biggest trade-off: the two female ports carry audio out only — no microphone input, no inline volume control, and it needs a device that already has a standard 3.5mm TRS jack.
• Who each is for: OONAISE for anyone whose headphones and device speak different connector languages; SAMZHE for anyone who wants to share one audio source with a second listener.
The OONAISE adapter is a one-trick cable, and that trick is genuinely useful. It takes a 3.5mm male plug on one end and presents a Type-C female port on the other, which means your existing wired headphones, earbuds or MP3-player cable can connect to a USB-C phone, tablet or laptop. It's an analog design, so the audio path stays simple rather than routing through extra conversion stages. Plug it in, plug your headphones in, and you're listening. No drivers, no settings menu, no pairing.
At 14.2 grams and roughly 4 x 2 x 0.2 inches in a silver finish, it's the kind of thing that disappears into a pocket or a laptop sleeve and only shows up when you actually need it. That makes it a good fit for commuters, students, karaoke setups, and anyone with a drawer full of perfectly good 3.5mm headphones who bought a phone without a headphone jack. It's also a sensible pickup if you move between a tablet, a laptop and a phone and want one small cable that covers all three.
The catch is the compatibility note, and I'd take it seriously. OONAISE states the adapter may not be suitable for iPhone, MacBook and iPad series, or Huawei Mate products. If your device falls into those groups, don't buy this hoping it works — the manufacturer is telling you it might not. Also note it has two ports total, one male and one female, so it converts but never splits. If you need two people listening, this is the wrong cable entirely. And there's no warranty listed, which is worth knowing before you commit.
The SAMZHE splitter does the opposite job: one 3.5mm male plug fans out into two 3.5mm female jacks, so two pairs of headphones — or a pair of speakers — can run off a single audio source. That's the classic use case: two people on a plane sharing a movie, two kids on a long car ride, a couple watching something on a laptop, or a small DIY setup where you want sound coming out of two places instead of one.
What stands out to me in the specs is the build. The connectors are 24K gold-plated, the inner conductors are oxygen-free copper, and there's triple shielding to keep static and signal loss down. The housing is scratch-resistant aluminum alloy, and the cable is flexible TPE with strain-relief rings at the joints — the spots where cheap splitters usually fail after months of being twisted and yanked out of a bag. SAMZHE also backs it with a 2-year manufacturer warranty, which is a meaningful signal for a cable this small.
Two practical details matter more than the spec sheet suggests. First, the slim connector is designed to fit most phone cases without removing them — a real annoyance with bulkier splitters. Second, the 9.8-inch tangle-free cable is short enough to coil into a pocket without becoming a knot. On the limits: the two female ports are output only. No microphone input, no inline volume control on your headset. If you're trying to split a gaming headset with a mic, this won't carry that mic signal. You also need a device that already has a standard 3.5mm TRS jack — this is not a converter, so a USB-C-only phone still needs something else in the chain.
Side-by-Side: Which Should You Choose?
• Best for USB-C phones and tablets → OONAISE Headphone Jack Adapter. It's the one that bridges a 3.5mm headphone plug to a Type-C port.
• Best for travel and portability → both are tiny, but the OONAISE at 14.2 g and 4 x 2 x 0.2 inches is the more pocketable of the two.
• Best for build quality and longevity → SAMZHE, thanks to aluminum alloy housing, gold-plated connectors, oxygen-free copper wiring, triple shielding and strain-relief rings.
• Best for warranty confidence → SAMZHE, which carries a 2-year manufacturer warranty. OONAISE lists no warranty.
• Best for older devices with a headphone jack → SAMZHE. It assumes a 3.5mm port exists; it doesn't create one.
• Best for karaoke, MP3 players and CD players → OONAISE, which lists those among its compatible devices.
• Skip OONAISE if → you use iPhone, MacBook, iPad or Huawei Mate gear, or you need two listeners at once.
• Skip SAMZHE if → you need to split a mic-equipped headset, or your source device has no 3.5mm jack at all.
In my opinion, most people searching this comparison actually want the SAMZHE Headphone Splitter 3.5mm. It solves a problem you notice every time it comes up — two people, one audio source — and the gold-plated, oxygen-free, triple-shielded build with a 2-year warranty makes it the safer long-term buy of the two. I'd pick OONAISE only if your specific problem is a 3.5mm headphone plug and a USB-C-only device, and only after confirming your phone or laptop isn't on the manufacturer's incompatibility list. If that's your situation, it does its narrow job cleanly. Otherwise, the splitter is the more broadly useful cable.
No. OONAISE converts a 3.5mm plug to a USB-C connection — one input, one output. SAMZHE takes one 3.5mm jack and turns it into two, for two listeners. Different jobs entirely.
Not on its own. It requires a device with a standard 3.5mm TRS jack. If your phone has no headphone port, you'd need a separate adapter first — which is exactly what the OONAISE cable provides for 3.5mm headphones.
SAMZHE is explicit that its two female ports are audio output only and it does not support mic input or inline volume control. OONAISE describes analog audio transmission for headphones and earbuds, and its compatibility note flags iPhone, MacBook, iPad and Huawei Mate as potentially unsuitable.
Both are small accessories, so value really depends on whether the cable solves your problem. Check the current price on Amazon and weigh it against how often you'd actually use it — a splitter earns its keep on every shared movie or road trip, while the adapter matters only if you're stuck with a mismatched connector.
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