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C520-M Blackwire Stereo USB Headset w/Smart Sensors – Microsoft – Discontinued

Discontinued – Click for more info
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Every order includes unlimited lifetime support from our Headset Helpdesk, saving you time and money.

Microsoft Certified UC C520-M Stereo corded headset is Smart – just put it on your head and it answers the call

  • Replaced by Blackwire C5220 September 2018
  • Certified for Skype for Business and optimized for Microsoft Lync
  • 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-M) for those who prefer to leave one ear open to their environment
  • Smart Sensor technology intuitively manages calls and audio: answer a Lync 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
  • Controls have audio alerts to manage 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
  • Features ear cushions that fold flat, and includes a high-quality, durable carrying case for easy storage and portability
  • Plantronics optional 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
  • Also available in standard UC version for UC applications and softphones from Avaya, Cisco, IBM, and more
  • 2 year manufacturer’s warranty
BTP Model: PL-C520-M
MFR Part: 88861-02

Additional information

Weight 0.75 lbs
Dimensions 8.25 × 8.50 × 2.25 in


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User Guide PL-C520-M

Data Sheet PL-C520-M

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.


“I want to let all of you at Business Telecom Products know that your customer support and high level of service is very much appreciated.”Read more

Joe S., Olympia, WA