Poly Savi 7220 monaural wireless headset for desk phone
Poly Savi 8220 Duo Wireless DECT ANC Headset
Giveet Bluetooth Headset for Cell Phones, Wireless Headset for Office Phone with Charging Dock, Noise Cancelling Microphone, 17h Talking Time for Trucker, Telephone, Skype, Call Center, PC: Amazon.co.uk: Electronics & Photo
Headsets that can be used with both desk phone and computer (and Cell phone too) - HeadsetPlus.com Plantronics, Jabra Headset Blog