Yealink WH64 Hybrid MONOTeams DECT Wireless Headset. Innovative Noise Reduction System with 3-Mic Noise Cancellation solution, bringing a 74% increase in microphone length from 78mm to 135.7mm*. Plug & Play for mainstream IP Phones Device compatibility is implemented in any device that uses a base as a point of communication between two connected devices. Multiple devices Connection Enhanced ways to work for all scenarios solution PC + IP Phone + Mobile Phone