The Shure AD2/K8B=-K55 is a professional Axient Digital handheld transmitter featuring the black KSM8 dual-diaphragm dynamic capsule, operating in the 606–694 MHz band. The KSM8 delivers exceptionally natural, controlled vocal reproduction with outstanding off-axis rejection, making it ideal for touring, broadcast, theatre and corporate events. With excellent RF stability, low latency and rugged build quality, it provides reliable, high-end wireless performance for demanding live productions.