How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a straightforward, no-fuss pair of wired USB-C earbuds that work across a huge range of phones and tablets and gives you two pairs in one pack, choose MAS CARNEY USB C Earbuds; if you need a single-ear headset built specifically for calls, meetings and clear voice pickup in a noisy office, choose acer USB Headset.
• MAS CARNEY USB C Earbuds — biggest strength: in-ear USB-C earbuds with an inline mic, a dynamic driver covering 20–20,000 Hz, and a pack of two so you always have a spare.
• MAS CARNEY USB C Earbuds — biggest trade-off: they're a general-purpose listening tool, not a specialist call device, and they're wired, so there's no freedom to move away from your device.
• acer USB Headset — biggest strength: a single-ear on-ear headset tuned for voice, with DSP noise filtering on the mic and push-button controls.
• acer USB Headset — biggest trade-off: it's a mono, on-ear design aimed at desk work, so it's a poor fit for music, movies or gaming where you want stereo immersion.
• Buy MAS CARNEY USB C Earbuds if you bounce between phones, tablets and laptops and want cheap, reliable, pocketable earbuds — and a backup pair.
• Buy acer USB Headset if your day is calls, meetings and call-center work, and you want your voice to come through cleanly over background chatter.
The MAS CARNEY USB C Earbuds (model TH9) are exactly what the name says: a wired, in-ear USB-C earphone with a built-in microphone. No adapter, no dongle, no pairing dance — you plug the USB-C jack straight into your device and you're listening. Inside is a dynamic driver with a 20–20,000 Hz frequency range, which is the full span of human hearing and the standard range you'd expect from a general-purpose earphone. The housings use a mix of plastic and silicone with rounded tips, and they come in black or white.
Who should buy it? Students, commuters, gym-goers and anyone who wants simple wired audio on a USB-C phone or tablet without spending much. The inline mic handles casual calls and quick voice chats fine. Who should skip it? If your job is back-to-back meetings and you need the person on the other end to hear you clearly over a noisy room, this isn't a specialist voice device — the noise control is listed as none, and the mic is a basic integrated one. It's also worth noting there's no built-in media storage or onboard playback; it's purely a plug-and-play wired earphone.
acer USB Headset: Who It's For
The acer USB Headset (model OHW325) is a different animal entirely. It's a wired, on-ear, single-ear headset — the kind of thing you see on desks in offices and call centers. The headline feature is the microphone side: it uses Digital Signal Processing to filter out background noise so your voice reaches the other person cleanly. That's the exact problem a call headset exists to solve, and it's the reason this product exists in the first place.
Design-wise, it's on-ear with a plastic enclosure in black and gold, and it ships with a cable, a storage bag and a user manual. Connectivity is listed as a 3.5 mm jack, and the product name also references USB-A/C, so it's clearly positioned as a flexible desk headset you can move between a laptop and a phone or tablet. There are push-button controls on the headset, which is handy for muting or adjusting on the fly without hunting through software menus. Passive noise cancellation helps block some surrounding sound from reaching your ears, and acer backs it with a one-year warranty.
Who should buy it? Remote workers, office staff, support agents, teachers running online sessions — anyone whose primary audio task is talking, not listening to music. The single-ear, on-ear format is deliberate: it leaves one ear open so you stay aware of your surroundings, which is exactly what you want in a shared office or when you're juggling a call and a conversation.
Who should skip it? If you want to listen to albums, watch movies or game, a mono on-ear headset is the wrong tool. You're giving up stereo separation and in-ear isolation. And if you want something pocketable for the commute, this isn't it — it's a desk accessory. It's also an adult-oriented product with a single unit in the box, so there's no spare.
• Best for phone and tablet listening → MAS CARNEY USB C Earbuds. Explicit USB-C support across iPhone 15/16, iPad, Galaxy, Pixel and more.
• Best for clear voice on calls → acer USB Headset. DSP noise filtering on the mic is the feature that matters here.
• Best for commuting and the gym → MAS CARNEY USB C Earbuds. In-ear, lightweight, wired and pocketable.
• Best for office and call-center work → acer USB Headset. Single-ear on-ear design keeps you aware of your surroundings.
• Best for multiple devices / households → MAS CARNEY USB C Earbuds. Two pairs in the pack and broad device compatibility.
• Best for stereo music and movies → MAS CARNEY USB C Earbuds. A stereo in-ear pair will always beat a mono single-ear headset for this.
• Best for hands-on controls → acer USB Headset. Push-button controls on the headset itself.
• Best warranty coverage → acer USB Headset. One-year warranty versus the standard warranty on the MAS CARNEY pair.
In my opinion, these two products barely compete — they're built for different jobs, and that's the most useful thing I can tell you. If you want earbuds for music, podcasts, gym sessions and phone calls, I'd buy the MAS CARNEY USB C Earbuds, mainly because the device compatibility is broad and you get two pairs. If your workday is meetings and calls, I'd buy the acer USB Headset instead, because the DSP mic filtering and the single-ear format are designed for exactly that scenario. Buy for the task, not the brand.
They have an integrated microphone and work for casual calls and voice chats. But the noise control is listed as none, so in a loud room your voice may not come through as cleanly as it would on a headset with dedicated mic processing.
The product is positioned for PC and laptop use, and its name references USB-A/C and 3.5 mm. The 3.5 mm jack is the listed connection, so check that your device has a matching port or the right adapter before buying.
MAS CARNEY USB C Earbuds, without question. They're a stereo in-ear pair with a dynamic driver covering 20–20,000 Hz. The acer is a single-ear on-ear headset built for voice, not for music.
I don't publish prices here — they change often. Use the "Check latest price on Amazon" button on this page to see the current price for each and compare them side by side.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.