Amazon.com: Plantronics CS540 Wireless Headset System Bundle (Standard Bundle): Electronics
Replacement Battery for Plantronics CS540 C054 Wireless Headset Headphones Repair for 86180-01, PL-86180-01 & 84479-01, Rechargeable Li-Polymer Battery, LI-POL, 140mA: Amazon.ca: Health & Personal Care
Amazon.com: Plantronics - EncorePro HW540 Convertible Headet - Wired Convertible (3 wearing styles) Headset with Boom Mic - Connect to your PC and/or Deskphone
Amazon.com: Poly - CS510 Support Convertible Wireless Headset (Plantronics) - Over-the-Head One Ear/Monaural Headset - DECT 6.0 - Connects to Desk Phone - Telephone Headset