The Shure AD2/K9B=-K55 is a premium Axient Digital handheld transmitter fitted with the black KSM9 condenser capsule, operating in the 606–694 MHz band. Offering dual-pattern flexibility and exceptional vocal clarity, the KSM9 delivers studio-grade detail for touring artists, broadcast, theatre and high-end corporate events. With rock-solid RF performance, low latency and rugged construction, this transmitter ensures reliable, world-class wireless audio on the most demanding stages.