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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-29 · 7 min read · Independent comparison
• Trendirect USB C Headphone — biggest strength: an enormous USB-C compatibility list that spans Apple, Samsung, Google, OnePlus, Sony and even the older Note and S-series phones, so it is the safer pick if your household mixes devices.
• Trendirect USB C Headphone — biggest trade-off: it is a traditional in-ear design that sits deeper in the ear canal, which some people find fatiguing over a full workday.
• Rosmas USB C Headphones — biggest strength: a semi-in-ear shape plus a built-in DAC chip and a 1.2 m tangle-resistant cable, which suits long calls, podcasts and desk work.
• Rosmas USB C Headphones — biggest trade-off: the compatibility list is broader on paper but shallower in detail, and a semi-in-ear seal blocks less outside noise than a deep in-ear fit.
• Who each pick is for: Trendirect for the multi-device household that wants one pair to cover a drawer full of USB-C gear; Rosmas for the person who wears earbuds for hours and wants a relaxed, pressure-free fit.
The headline here is compatibility, and it is not a vague claim. Trendirect lists the iPhone 17 line right down to the 17 Air, the iPad Pro, Air and Mini, MacBook and MacBook Pro, the Galaxy S26 Ultra and S26 Plus, the A57 and A37, the S25 and S24 families, older S20-era phones, the Note 8 through Note 20 Ultra, the Galaxy Z Fold and Flip lines, the Galaxy Tab tablets, the Pixel 10 through Pixel 2 XL, OnePlus, and Sony Xperia. If you have ever bought a USB-C headset only to discover your phone routes no audio to it, that breadth is the whole point.
The physical design is a black plastic in-ear build with a 10 mm dynamic driver, a 20 Hz low-end rating, 98 dB sensitivity and a 1 ohm impedance figure. There is an inline control unit with touch control and volume buttons, plus a microphone for calls. Passive noise cancellation comes from the seal itself rather than any active circuitry. Trendirect also adds a magnetic back on each earbud and an anti-knot cable design, which makes the pair easier to coil and pocket without a bird's nest forming. The included carrying case measures 3.5 inches tall, and the whole package is backed by an 18-month warranty.
In my opinion this is the pair to buy if your household is a mixed-device household. One drawer, one pair, and it works whether the person grabbing it has an iPhone 17 in one hand or a Galaxy A57 in the other. It also suits commuters, bus riders, runners and climbers — the in-ear seal helps shut out engine noise and street noise, and the magnet-and-coil setup keeps it tidy between uses.
Who should skip it? Anyone who has had trouble with deep in-ear tips. The ergonomic shaping is there to reduce fatigue, but this is still an in-canal design, and if you know from experience that your ears ache after an hour of that, the semi-in-ear approach below is the smarter match. Skip it too if you mainly listen at a desk for very long stretches and value a looser, airier fit over isolation.
Rosmas takes the opposite design philosophy. The earbuds are semi-in-ear, meaning they rest at the entrance of the ear canal instead of pushing inside it. The stated goal is comfortable listening over long sessions without deep pressure, and that is a real, physical difference — not a marketing label. For anyone who takes calls all afternoon, sits through online classes, or listens to audiobooks and podcasts for hours, that fit can matter more than anything else on the spec sheet.
The other differentiator is the built-in DAC chip. A digital-to-analog converter handles the audio conversion inside the earbud, which Rosmas describes as providing stable transmission, clear vocals, balanced stereo and reduced signal loss. The frequency range is listed as 20 Hz to 20,000 Hz with a dynamic driver. There is a built-in microphone for calls and meetings, and an inline remote that handles volume, play/pause, track skipping and answering or ending calls. The cable runs 1.2 m and is described as tangle-resistant. The earbuds are white, and the package includes a user manual with an 18-month warranty.
Rosmas also makes a point of plug-and-play simplicity: no charging, no Bluetooth pairing, no adapter. That is the quiet advantage of wired USB-C earbuds in general, and it is worth saying plainly — you never think about battery percentage. You also never think about pairing failures in the middle of a call.
Who should skip it? If your priority is blocking out a noisy train or a loud office, the semi-in-ear seal lets more ambient sound through. And if you are buying for a device that is not on the compatibility list, Rosmas explicitly tells you to confirm your device supports USB-C audio output first — a sensible check, since the list is described more generally than Trendirect's.
Side-by-Side: Which Should You Choose?
• Best for long-session comfort → Rosmas USB C Headphones. The semi-in-ear shape avoids deep ear-canal pressure.
• Best for audio conversion → Rosmas USB C Headphones. Its built-in DAC chip is the only one of the two that names a dedicated converter.
• Best for noise isolation → Trendirect USB C Headphone. A deeper in-ear seal blocks more outside sound than a semi-in-ear fit.
• Best for cable length and tidy storage → Rosmas USB C Headphones. A 1.2 m tangle-resistant cable, versus Trendirect's anti-knot coil and magnetic backs.
• Best for a mixed Apple-and-Android household → Trendirect USB C Headphone. It lists both ecosystems in explicit model detail.
• Best for calls, meetings and classes → Rosmas USB C Headphones. The inline remote covers volume, play/pause, track skip and call handling.
• Best for low-light or color preference → Rosmas USB C Headphones in white; Trendirect comes in black. Trendirect also ships with a 3.5-inch carrying case.
I would buy the Trendirect USB C Headphone. In my opinion, the deciding factor is that long, explicit compatibility list — it removes the single most common frustration with USB-C wired earbuds, which is discovering after the fact that your particular phone or tablet will not pass audio through. Add the in-ear seal for noisy commutes, the magnetic backs, the anti-knot cable and the carrying case, and you get a pair that is easy to live with across several devices. The Rosmas pair is the better choice if you specifically want a semi-in-ear fit and a DAC chip, and for desk-bound, hours-long listening that is a genuinely strong argument. But if I had to pick one for the household drawer, I would take Trendirect.
Yes — the compatibility list names the iPhone 17, 17 Pro, 17 Pro Max and 17 Air, along with the 16 and 15 families, iPad Pro, iPad Air, iPad Mini and MacBook models.
No. They are wired USB-C earbuds, so they run from your device's port with no battery and no pairing step — plug in and go.
The Trendirect pair, in my opinion. Its in-ear design seats deeper and blocks more ambient noise, while the Rosmas semi-in-ear shape is built for comfort and deliberately lets more outside sound in.
Match the fit to your ears and the list to your devices. If you own several USB-C gadgets and want isolation, go Trendirect. If you wear earbuds for hours and want a pressure-free fit with a DAC chip, go Rosmas. Check the current price on Amazon before deciding.
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