Poly Blackwire 3320 Stereo USB-C/A Headset

The Blackwire 3320 is the stereo (duo) workhorse of Poly's Blackwire 3300 corded series — dependable call audio at a price that makes sense across a whole department. This USB-A/C version includes both connector types, so one purchase covers every desk regardless of whether the machines are USB-A or USB-C.

If your fleet is all USB-A, the plain Blackwire 3320 USB-A does the same job for the same money. Prefer one ear open? The mono Blackwire 3310 is the single-ear sibling, and the Blackwire C5220 steps up the comfort for the longest days.

Key features

• Duo (stereo) design covers both ears so you stay locked on the conversation.
• USB-A and USB-C in one headset — deploy across mixed hardware without adapters.
• Noise-cancelling boom microphone keeps office background noise out of your calls.
• In-line call controls for answer/end, mute and volume without touching the screen.
• Plug-and-play USB audio — no software installs, no charging, no downtime.
• Adjustable padded headband built for full-shift comfort.

Works with

• Poly Blackwire 3310 — the mono sibling
• Poly Blackwire 3320 USB-A — USB-A only version
• Poly Blackwire C5220 — premium binaural step-up
• All headsets

Frequently asked questions

What does USB-A/C mean?

The headset connects by USB and covers both USB-A and USB-C, so it plugs straight into older desktops and current laptops without a separate adapter.

Should I buy the 3310 or the 3320?

The 3310 is mono (one ear); the 3320 is duo (both ears). Choose duo for noisy offices and concentration, mono for staying aware of the room.

Will it work with my UC platform?

Yes — it is a standard USB audio device and works with the leading softphone and meeting clients on PC and Mac.

Is there anything to charge?

No — it is corded and USB-powered, so it is always ready at the desk.

Fitting out the whole office? Call 0333 242 1314 or email sales@clisecure.com and we will match the right headsets to your phones before you order.