Yealink CMKit is a comprehensive package designed as the core setup for the Yealink audio ceiling solution. It includes the CM20 ceiling microphone, a pair of CS10 ceiling speakers, and an RCH40 E2 switch. Ideal for standard-sized medium to large conference rooms (5m x 8m), one CMKit-121 provides complete coverage. For extra-large conference rooms (6m x 10m), two packages can be combined to extend coverage. Each package functions as an independent audio unit, guaranteeing secure and stable audio experience.