Shure ADX2FD/K11 Axient Digital Wireless Handheld Microphone Transmitter, Frequency: G57 (470-608 MHz) | Color: NickelADX2FD K11 features the prized combination of full lows, clear mids and high end of the KSM11 Cardioid Condenser Microphone. Combined with ADX transmitters this combination sets the stage for exceptional performance. Frequency Diversity with wide tuning up to 184 MHz, interference protection, advanced rechargeability, streamlined design, and ShowLink remote control for real time parameter adjustments right from the booth. Note: When purchasing