Poly
PLAN_C5210-USBPoly Blackwire C5210 USB Monaural Headset
The Blackwire C5210 is the monaural member of Poly's comfort-focused Blackwire 5200 corded series. It is aimed at people who live on calls — answering questions, joining meetings, helping customers — and want a single-ear headset that still feels fine at the end of a long day. A carry case is included, which makes it a tidy companion for hybrid workers moving between home and office.
If you would rather block the office out entirely, the binaural Blackwire C5220 covers both ears. The Blackwire 5210 USB-A/C is the closely related variant with both USB connector types, and the Blackwire 3210 is the value mono pick.
Key features
- Ergonomic 5200-series design — comfortable enough to wear all day, even on the longest calls.
- Monaural wearing style keeps one ear open to colleagues while you work.
- Noise-cancelling boom microphone so customers hear you, not the office.
- Straightforward USB connection — plug in and talk, with no drivers to install.
- Carry case included for commuting and hot-desking without tangles or damage.
- Corded and USB-powered — nothing to pair and nothing to charge.
Works with
- Poly Blackwire C5220 — the binaural sibling
- Poly Blackwire 5210 USB-A/C — with both USB connectors
- Poly Blackwire 3210 — the value mono option
- All headsets
Frequently asked questions
What does monaural mean?
One speaker over one ear — you hear the call clearly while staying aware of the room. For both-ears immersion choose the C5220.
Why pick the 5200 series over the 3200 series?
Comfort. The 5200 series is ergonomically designed for people who wear a headset for hours, whereas the 3200 series is the entry-level range for lighter use.
Will it work with my softphone or meeting app?
Yes — it presents as a standard USB audio device and works with the leading UC clients on PC and Mac.
Does it need charging?
No — it is a corded USB headset, always ready at the desk.
Choosing headsets for a support desk? Call 0333 242 1314 or email sales@clisecure.com and we will match the right headsets to your phones before you order.
Audio
| Speaker | Monaural (single ear) |
|---|---|
| Microphone | Noise-cancelling boom |
Connectivity
| Connection | Corded USB |
|---|
Wearing style & comfort
| Wearing style | Over-the-head, monaural |
|---|---|
| Design | Ergonomic 5200-series fit for all-day wear |
Compatibility & certification
| Platforms | PC and Mac (standard USB audio) |
|---|---|
| Softphones | Works with leading UC clients |
Product details
| Brand | Poly |
|---|---|
| Part number | PLAN_C5210-USB |
| In the box | Blackwire C5210 monaural headset, carry case, safety manual |
UK shipping options are shown at checkout. For timed delivery, project fulfilment or larger trade orders, contact CLI Secure before placing your order.
Customer reviews
Built for B2B buying
From product selection to deployment, this is made for real projects.
Get the hardware, licences and supporting kit you need without chasing multiple suppliers. CLI Secure helps trade buyers confirm fit, stock, delivery and project pricing before checkout.
Complete the basket
Related products for this project
Why choose us
Procurement that feels fast, clear and trade-ready.
Every product page is designed to help you move from shortlist to checkout with fewer unknowns.
Common questions
Product and order FAQs
Can I request trade or bulk pricing?
Yes. For multi-unit, reseller or project orders, contact CLI Secure and our team can review the basket for trade pricing.
How quickly can this be delivered?
Available delivery options are shown at checkout. Many in-stock products support next-day or timed UK delivery.
Can you help confirm compatibility?
Yes. Share the existing setup, model numbers or project requirement and we can help confirm suitable hardware, licences or accessories.
Do you supply renewals and supporting accessories?
CLI Secure supplies hardware, renewals, licences and related accessories across networking, CCTV, VoIP and IT support categories.