Poly Blackwire 3310 Monaural USB Headset Review
A single-ear headset with a dedicated Teams button, for desks where you still need to hear the room.
| Brand | Poly |
|---|---|
| Model | 2-214011-333 |
| Wearing style | Monaural, one ear open |
| Microphone | Flexible boom |
| Speaker articulation | 180 degree pivot |
| Adjustment | Fully adjustable headband |
| Best for | Contact centres and shared desks where awareness of the room matters |
Product Overview
Monaural headsets exist for a specific reason that stereo ones cannot serve: keeping one ear on the room. In a contact centre, at a shared desk, or anywhere a colleague might need you mid-call, hearing what is happening around you is a requirement rather than a compromise.
Poly states the wearing style plainly: keep one ear open with the monaural design. That is the single feature this headset exists for, and it is why it sits alongside rather than below the stereo models in the same range.
The other distinguishing element is the dedicated Microsoft Teams button. Rather than hunting for the Teams window, a button on the headset brings the app up. On a machine running several applications that is a small saving repeated dozens of times a day.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
One ear covered and one open, so you hear the caller and the room at the same time.
The earpiece rotates to sit correctly on either ear, which a fixed speaker angle cannot do.
Positions the capsule near the mouth, which is what makes callers hear your voice rather than the floor you work on.
A hardware key brings up the Microsoft Teams app, removing the window hunt when a call arrives.
Works on a current laptop or an older dock, with the adapter supplied rather than sold separately.
Less heat and pressure over a long shift than a stereo pair, which is part of why call centres prefer monaural.
Design and Build Quality
The headset is fully adjustable, with a 180 degree pivoting speaker and a flexible microphone boom. The pivot matters more on a monaural headset than a stereo one, because a single earpiece has to sit correctly on whichever ear you prefer, and a fixed speaker angle suits only one side.
Comfort comes from a padded headband and what Poly describes as a pillow soft ear cushion, singular, consistent with the monaural design. For long wearing a single cushion also means less heat and less pressure than a stereo pair, which is part of why contact centre staff often prefer them.
Connectivity is USB-C with a USB-C to USB-A adapter included, so it works on a current laptop or an older dock. Note what is absent: unlike the stereo 3325 in the same range, there is no 3.5mm connection, so this is a computer headset rather than one you also plug into a phone. Model and part number are both 2-214011-333, and the brand field on the listing still shows PLT, Plantronics' legacy abbreviation.
Performance in Everyday Use
The monaural decision defines everything else. You give up stereo imaging and any pretence of media listening, and you gain situational awareness. For a role where someone taps your shoulder or a colleague calls across the desk, that trade is obviously correct, and for a role where you want to disappear into focused work it is obviously wrong.
The boom mic is the part shared with the rest of the range and the part that matters most on calls. A flexible boom positions the capsule near the mouth, which is what makes callers hear your voice rather than the room, and on an open-plan floor that is the difference between a professional call and an apologetic one.
The Teams button is genuinely useful rather than a certification sticker. A dedicated hardware key to bring up the Teams app removes the window-hunting that happens when a call comes in and you have six applications open. Poly specifies this as the Microsoft Teams version of the headset.
Poly's own audio claim here is vague. Enhanced Audio is described only as Poly signature audio quality and reliability, with no frequency response, driver size or microphone pickup pattern published. We have not dressed that up into something more specific than the listing supports.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Wearing style | Monaural, one ear left open | Listing states you keep one ear open with the monaural wearing style | 9.5 | Room awareness during calls is a requirement in contact centres, not a compromise |
| Speaker articulation | 180 degree pivoting speaker | Listing states the fully adjustable headset has 180-degree pivoting speakers | 9.5 | A single earpiece has to sit correctly on whichever ear you prefer |
| Microphone | Flexible microphone boom | Listing states professional voice quality with a flexible microphone boom | 9.0 | A boom near the mouth is what keeps the open-plan floor out of your calls |
| Platform integration | Microsoft Teams version with a dedicated Teams button | Listing states a Microsoft Teams version with a dedicated Teams button for instant access to the Teams App | 9.0 | A hardware key removes the window hunt when a call arrives |
| Connectivity | USB-C with a USB-C to USB-A adapter, no 3.5mm | Listing states connection to PC or Mac with USB-C or via USB-A with the included adapter, and names no mobile connection | 7.5 | This is a computer headset, unlike the 3325 which adds 3.5mm |
| Comfort | Padded headband with a single soft ear cushion | Listing states a padded headband and pillow soft ear cushion for long-wearing comfort | 9.0 | One cushion runs cooler than a pair across a full shift |
| Published audio detail | None beyond a general quality claim | The Enhanced Audio bullet states only Poly signature audio quality and reliability, with no frequency response, driver size or pickup pattern | 5.5 | You cannot compare audio on a claim with no numbers behind it |
Who Should Buy It
- Contact centres and support desks
- Shared offices where colleagues interrupt
- Roles needing awareness of the room during calls
- Long shifts where a stereo pair gets hot
- Microsoft Teams as the primary platform
- Music listening, immersive work, or anyone wanting to block the room out
- Monaural, so no stereo audio or media listening
- No 3.5mm connection, unlike the stereo 3325
- No frequency response or mic pattern published
- Enhanced Audio claim carries no measurable detail
Full Specifications
How It Compares
| Feature | Poly | Typical budget | Premium option |
|---|---|---|---|
| Wearing style | Monaural, one ear open | Stereo, both ears | Stereo with active cancellation |
| Room awareness | Retained by design | Reduced | Deliberately blocked |
| Mobile connection | None, computer only | None | 3.5 mm included |
| Platform key | Dedicated Teams button | No dedicated key | Dedicated key |
| Speaker articulation | 180 degree pivot | Fixed angle | Pivoting |
| Published audio detail | None | None | Frequency response stated |
Alternatives Worth a Look
Buy this for the single ear, not despite it. Monaural is the right choice for a contact centre or a shared desk where you need to hear a colleague as well as the caller, and the 180 degree pivot means it sits properly on whichever ear you use. A dedicated Teams button saves a small action many times a day. If you want to block the room out or listen to anything in stereo, the 3325 in the same range is the one to look at instead.
Frequently Asked Questions
Why would I want a one-ear headset?
To hear the room as well as the call. In a contact centre or at a shared desk, a colleague may need you mid-call and you need to notice. Poly states the monaural style keeps one ear open, which is the entire reason this model exists alongside the stereo versions.
Can I wear it on either ear?
Yes, and that is what the pivot is for. The speaker rotates through 180 degrees and the headband is fully adjustable, so the earpiece sits correctly on whichever side you prefer. A fixed speaker angle would suit only one ear properly.
Does it connect to a phone?
No. This model connects to a PC or Mac over USB-C, or over USB-A with the included adapter, and the listing names no mobile connection. If you need a headset that also plugs into a phone, the stereo 3325 in the same range adds a 3.5mm connection.
What does the Teams button do?
It brings up the Microsoft Teams application. Poly specifies this as the Microsoft Teams version of the headset with a dedicated button for instant access. When a call arrives and you have several windows open, a hardware key is faster than finding the right one.
How is it different from the Blackwire 3220?
Mainly the wearing style and the platform key. The 3220 is stereo with both ears covered and lists Teams and Zoom compatibility. This 3310 is monaural with one ear open and carries a dedicated Teams button. Pick on whether you need room awareness.
Is it comfortable for a full shift?
Poly positions it that way, with a padded headband and a single pillow soft cushion for long wearing. A monaural headset also runs cooler than a stereo pair simply because only one ear is covered, which is part of why call centre staff tend to prefer them.
What audio specifications does Poly publish?
Very little. The listing's audio bullet says only Poly signature audio quality and reliability, with no frequency response, driver size or microphone pickup pattern given. We have reported that gap rather than inferring figures the listing does not support.
Why does the listing say PLT rather than Poly?
PLT is Plantronics' legacy ticker abbreviation, and Plantronics became Poly. The brand field on the listing still carries the old reference while the product itself, its title and its packaging are all branded Poly. It is the same company.
This review is based on the manufacturer's stated specifications, the current product listing and its images, the confirmed wearing style, microphone and speaker articulation, connectivity, platform features, model number and brand field, and our own research into how monaural and stereo work headsets differ. It is editorial analysis, not laboratory testing, and we have not worn this headset ourselves. Poly publishes no frequency response, driver size or microphone pickup pattern on this listing, and its Enhanced Audio bullet carries no measurable detail, so we have not inferred any.