Plantronics Savi 8210-M DECT Cordless Headset | Headset Store
Plantronics - CS540 DECT headset — single-ear wireless headset (mono), 3 different wearing styles - connection to a desk phone - microphone with noise cancelling & range of up to 120 m:
Plantronics CS60 DECT Cordless Headset and Charging Stand