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C520 Blackwire Stereo USB Headset w/Smart Sensors UC – Discontinued

Discontinued – Click for more info
Who we are logo, BTP representative with headsets

Every order includes unlimited lifetime support from our Headset Helpdesk, saving you time and money.

Blackwire C520 corded USB headset is Smart – just put it on your head and it answers!

  • Replaced by Blackwire C5220 September 2018
  • Stereo Hi-Fi blocks out annoying background noise and gives you a richer, more immersive audio experience
  • Also available in single-ear mono (Blackwire C510) for those who prefer to leave one ear open to their environment
  • Smart Sensor technology manages calls and audio: Answer a call by simply placing the headset on your head!
  • Simple, intuitive, inline controls let you answer/end, mute, and control the volume of your calls with ease
  • Audio alerts tell you about connection, mute, and volume status
  • A dynamic EQ feature optimizes your voice quality when on calls and automatically adjusts the EQ settings when youre listening to music or multi-media playback
  • Premium PC wideband audio with noise-canceling microphone and Digital Signal Processing (DSP) for a more natural voice sound
  • Ultra-soft leatherette ear cushions and lightweight headband means all-day comfort and a secure fit
  • Speakers fold flat for storing in high-quality, durable carrying case (included) for portability
  • Plantronics Spokes software provides added benefits: call control across multiple softphones, headset control panel allows for customization of settings, including call notification and related options, UC presence automatically updated when on a call
  • Offered in two versions: UC Standard version built for UC applications and softphones from Avaya, Cisco, IBM, Skype and more and optimized version for Microsoft Lync 2010 and Microsoft OCS 2007
  • 2 year manufacturer’s warranty
BTP Model: PL-C520
MFR Part: 88861-01

Additional information

Weight 0.75 lbs
Dimensions 8.25 × 8.50 × 2.25 in


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User Guide PL-C520

Data Sheet PL-C520

Our Unmatched, Value-added Service Saves You Time, Money and Hassles:

  • Experienced consultants help you choose exactly the products you need, preventing unnecessary purchases
  • Free user setup help and training
  • 100% satisfaction guaranteed
  • Our team is committed to answering every call live during business hours
  • Same-day response to emails
  • Same-day shipping
  • Full warranty facilitated by BTP


For customer service, sales inquiries, and technical support, contact us Monday“Friday, 8-5 Pacific Time. (After-hours messages and emails are promptly returned the following business day.)

Call: 800-457-4287 or 425-649-9262

Email: info@btpi.com

Manufacturer discontinued.


“Thank you so much for the prompt, detail oriented and efficient effort with my order. You can now call me a repeat customer because of this, as the thisRead more

Christine N., Seattle, WA
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