POLY/PLANTRONICS CS540 Wireless Headset (84693-01) - PLAN-CS540 - New - 5 Year Warranty
Plantronics CS540 Monaural Wireless Headset with C054 Charging Base & AC Adapter | eBay
Plantronics CS540 (C054) Headset Not Charging? 3 Quick Troubleshooting Tips – Merrittcomm Blog | Wired & Wireless Headsets, Productivity, Efficiency
Plantronics CS540 Wireless Headset with Lifter P/N 84693-11
Amazon.com: Plantronics by Poly Voyager 5200 UC Wireless Headset & Charging Case - Single-Ear Bluetooth Headset w/Noise-Canceling Mic - Connect Mobile/Mac/PC via Bluetooth - Works w/Teams, Zoom - (206110-102) : Cell Phones