Sennheiser SD PRO2 - Stereo (Duo) Deskphone cordless Headset Bundle with Remote Answering Lifter | For Cisco, Polycom, Avaya, Yealink, ShoreTel and other business desk phones | Compatible with IP telephones, Digital
EPOS I SENNHEISER IMPACT SDW 5061 - wireless headset system - 1000981 - Wireless Headsets - CDW.com
EPOS/SENNHEISER IMPACT SC 45 USB MS Mono On-Ear PC 1000634 B&H