Shure QLXD24/KSM9 V51, Digital VHF Wireless System with KSM9 Capsule, Frequency band: V51 (174 - 230 MHz), Audio signal: 24-Bit/48 kHz, AES-256 encryption for secure transmissions, 42 MHz switching bandwidth, 22 Compatible channels in a single 8 MHz TV-band, Switchable transmission power: 1/10 mW, 120 dB Dynamic range, Metal handheld transmitter with Beta KSM9 condenser microphone capsule, Directional characteristic: Cardioid/Supercardioid (switchable), 9.5"" Metal receiver, Detachable BNC antennas, Ethernet connection for monitoring and configuration of the system, Frequency transmission via infrared interface, XLR/Jack output, Transmitter operates via 1.5 V AA batteries, or via SB 900 lithium-ion battery, Includes a PS23 power supply and a rackmount