Yealink EHS36 Wireless Headset Adapter - SIPMAX Hong Kong
Yealink EHS40 Wireless Headset Adaptor | connecting to Jabra, Sennheiser and Plantronics EHS headsets | ProVu Communications
Amazon.com: QD Adapter HIS Cable for Plantronics and VoiceJoy Headsets QD Adapter for Yealink Phones and Workable for Avaya IP 1608, 1616, 9601, 9608, 9611, 9611G, 9620, 9630, 9631, 9640, 9641, 9650, 9670 : Electronics