How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a proven, plug-and-play stereo headset from a brand that built its reputation on office audio, choose PLT Plantronics; if you need a modern work headset with dual ENC mics, a dedicated Microsoft Teams call button and a built-in busylight, choose Callez Computer Headset.
• PLT Plantronics (Blackwire 3320 USB-A) — biggest strength: premium stereo audio with wideband sound, DSP and SoundGuard acoustic limiting, backed by a 2-year global warranty. Biggest trade-off: no dedicated Teams call button or busylight, so call control lives on the inline controller.
• Callez Computer Headset (702TA/700TA) — biggest strength: dual ENC microphones with a 350-degree rotating boom plus one-touch Microsoft Teams answer/end and a visual busylight. Biggest trade-off: on-ear fit and a narrower stated frequency range of 85 Hz – 255 Hz, which is tuned for voice rather than music.
• Who PLT Plantronics is for: professionals who want reliable, comfortable stereo sound for long calls and light media use on a PC or Mac.
• Who Callez is for: Teams-heavy users, call center agents and home office workers who live in meetings and want quick call control.
• Quick gut check: PLT for audio quality and durability-minded buyers; Callez for meeting workflow and voice clarity.
The Blackwire 3320 USB-A is a wired, dual-ear (stereo) headset that connects to a PC or Mac over USB-A. That single cable is the whole setup — no pairing, no dongle juggling, no battery to babysit. For anyone who's ever lost ten minutes of a client call fighting Bluetooth, that simplicity is the point. It's also why this style of headset has stayed a fixture in offices long after wireless became trendy.
Audio is where the Blackwire line earns its keep. Plantronics lists wideband audio, a flexible noise-canceling microphone and enhanced digital signal processing (DSP) on this model. In plain terms, wideband audio means the headset captures and reproduces a wider band of speech than narrowband calling does, so voices sound more natural and less like a walkie-talkie. The noise-canceling mic works on what you send out, and the DSP cleans up the signal before it leaves your desk. There's also SoundGuard acoustic limiting, which protects your ears against sudden loud spikes above 118 dBA — a small detail that matters if you take calls all day and occasionally get a screech or a burst of feedback.
Comfort is clearly a design priority. You get a padded headband, soft foam ear cushions, 180-degree pivoting speakers and a flexible mic boom. The pivoting earcups let the headset lie flat against your chest or sit in a bag without snapping, and the over-ear fit spreads pressure around the ear rather than pressing on it. It weighs 130 g, which is light enough for a full workday without a hot spot on top of your head.
So who should buy it? In my opinion, this is the pick for the professional who wants one cable, consistent stereo sound, and a headset that behaves the same way every single morning. It's a strong fit for remote workers on Zoom, Teams and similar platforms, for students in online classes, and for anyone who wants to listen to music or watch video between calls — the stereo drivers and 20 Hz – 20 kHz range make it usable for more than talking.
Who should skip it? If your entire day runs through Microsoft Teams and you want to answer, end and join meetings with one physical button, this headset doesn't give you that. You also won't find a busylight here — the "do not disturb" signal your coworkers see when you're mid-call. And if you strongly prefer an on-ear fit over an over-ear one, the Callez design will feel more familiar.
The Callez 702TA/700TA is built from the opposite starting point: the meeting, not the music. Its headline feature is dual ENC microphones with noise-cancellation technology, paired with a flexible boom that rotates up to 350 degrees. ENC stands for Environmental Noise Cancellation — the headset's job is to separate your voice from the room around you, so the person on the other end hears you rather than your keyboard, your air conditioner or the colleague two desks over. The 350-degree rotation means you can park the mic on whichever side feels natural, or swing it up and out of the way when you're not talking.
The calling controls are the real differentiator. There's a dedicated Microsoft Teams call button: one press opens the Teams window or joins a meeting, and you can answer, end or cancel calls from the headset itself. Volume up/down and mic mute are built in too. And there's a visual busylight, which tells people around you that you're on a call — genuinely useful in an open office or a shared home space where a closed door isn't an option. These are the kinds of features that shave seconds off every meeting, and seconds add up fast when you're in eight of them a day.
On sound, Callez uses 28 mm speakers and quotes a frequency range of 85 Hz – 255 Hz. That's a voice-first tuning: it's aimed at making speech intelligible rather than making bass thump. If you want to listen to albums on this headset, you'll notice the difference against the Plantronics. For calls and conferences, though, that focus is an advantage. There's also Acoustic Shock Protection (ASP) to guard your hearing against sudden loud spikes — the same idea as Plantronics' SoundGuard, just under a different name.
Buy this one if your calendar is stuffed with Teams meetings, if you work in a call center or a busy home office, or if you simply want the fastest possible path from "meeting starts" to "I'm in." Skip it if music quality is a priority, if you prefer over-ear cups, or if your platform of choice isn't Microsoft Teams — the call button is the headline feature, and you'd be paying for a capability you won't use.
Side-by-Side: Which Should You Choose?
• Best for Microsoft Teams workflows → Callez. The dedicated call button and busylight are purpose-built for it.
• Best for overall audio quality and music between calls → PLT Plantronics. Stereo drivers with a 20 Hz – 20 kHz range versus the Callez voice-tuned 85 Hz – 255 Hz.
• Best for blocking your outgoing background noise → Callez. Dual ENC microphones with a 350-degree rotating boom are explicitly designed for noisy environments.
• Best for durability confidence and long-term support → PLT Plantronics. A 2-year global warranty from an established office-audio brand.
• Best for lighter weight on your head → Callez. Around 3 oz versus 130 g for the Plantronics.
• Best for minimal setup and no fiddling → PLT Plantronics. One USB-A cable, plug and play, nothing to configure.
• Best for open offices and shared rooms → Callez. The busylight signals "on a call" without you saying a word.
• Best for over-ear comfort seekers → PLT Plantronics. Over-ear cups with pivoting speakers versus the Callez on-ear fit.
• Best for protecting your hearing from spikes → a tie. Both list acoustic limiting (SoundGuard on the Plantronics, ASP on the Callez).
If I were buying for myself and my day was mostly Teams meetings in a noisy space, I'd take the Callez Computer Headset. The dual ENC mics, one-touch Teams call button and busylight solve problems I'd actually hit every single day, and the lighter build is easier on the head during back-to-back calls. If my priority were richer stereo sound, a more established office-audio pedigree and a simple plug-and-play experience, I'd take the PLT Plantronics Blackwire 3320 instead — in my opinion it's the better all-rounder for mixed work and media use. Check the current price on Amazon for both before you decide, since that's the one variable that can flip this either way.
Yes — it connects over USB-A to a PC or Mac and the brand lists it as working with Teams, Zoom and similar platforms. What it doesn't have is a dedicated Teams button, so you'll answer and hang up through the software or the inline volume control instead.
Callez describes it as a computer headset for Mac, Teams, Zoom, home office and call center use, so it's not locked to Teams. The one-touch call button, however, is specifically tied to Microsoft Teams for Business, which is where it adds the most value.
On paper, the Callez has the edge for outgoing noise, thanks to dual ENC microphones and a 350-degree rotating boom. The Plantronics counters with a flexible noise-canceling mic and DSP. If background noise on your end is the main concern, I'd lean Callez.
Not really its strength. Its stated 85 Hz – 255 Hz frequency range is tuned for voice intelligibility rather than full-range music. The Plantronics, with a 20 Hz – 20 kHz range and stereo drivers, is the better pick if you want one headset for both calls and media.
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