Plantronics
Plantronics CS510 Wireless Headset System DECT 6.0 Over-the-Head Monaural 84691-01
PO and Net 30 available for schools, government, hospitals, and law firms.
Description
Description
Plantronics CS510 Wireless Headset System (84691-01) — Refurbished
Save on the Plantronics (Poly) CS510 wireless headset system — a reliable, enterprise-grade DECT 6.0 headset designed for desk phone use. Professionally refurbished and backed by Reef Telecom's industry-leading 10-year warranty, this over-the-head monaural headset delivers hands-free productivity for busy office professionals.
Key Features
- DECT 6.0 Technology — 1.9 GHz frequency with 64-bit encryption for secure, interference-free calls
- Up to 350 Ft. Wireless Range — Move freely around the office while staying connected
- Noise-Canceling Microphone — Enhanced DSP filters background noise for crystal-clear conversations
- One-Touch Call Controls — Answer/end, volume, mute, and flash right on the headset
- Conference Up to 4 Headsets — Subscribe additional CS500/Savi headsets for group calls
- Adaptive Power System — Automatically optimizes for maximum range and talk time
- Over-the-Head Monaural Design — Lightweight and comfortable for all-day wear
- CAT-iq Wideband Audio — Premium voice quality on supported systems
Compatibility & Important Notes
The CS510 connects to corded desk phones and is compatible with 98% of office phone systems including Avaya, Cisco, Nortel, and more. For remote call answer/end, pair with an HL10 handset lifter or compatible EHS cable (sold separately). Note: This headset does not connect to computers or via USB — it is designed exclusively for desk phone use.
Free shipping on orders over $300. Questions? Our telecom experts are here to help.
Specs & Details
Specs & Details
Shipping & Warranty
Shipping & Warranty
Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.
All products include our industry-leading 10 Year Warranty backed by Reef Telecom.

We clean up after ourselves.
Ecommerce deliveries have a carbon footprint. That's why we support verified projects that remove carbon from the air.
Every delivery’s carbon footprint is calculated based on weight, shipping method, and distance traveled. We neutralize these emissions by purchasing verified carbon removal credits from groundbreaking projects.
With your purchase, you’ll join a community of proactive merchants and customers dedicated to a sustainable future. Together, we've removed emissions for over 81 million deliveries and removed over 56 thousand tonnes of carbon.
We work with a network of pioneering carbon removal companies that have been vetted by the commerce platform Shopify.
Reef Telecom Proudly Supports
-
Ocearch
2026 Monthly Shark Hero -
Coral Restoration Foundation
2025 Staghorn Donor -
Ocean Conservancy
2025 Donor
Smart IT. Clean Oceans. Boundless Possibilities.
Our goal is providing the highest quality refurbished equipment to promote environmentally-conscious equipment usage through it's lifecycle.