Shure QLXD24/SM58 V51, Digital VHF Wireless System with SM58 Capsule, Frequency band: V51 (174-230 MHz), 24-bit / 48 kHz audio signal, AES-256 encryption for secure transmission, 42 MHz bandwidth, 22 Compatible channels in an 8 MHz TV band, Switchable transmitter power 1/10 mW, 120 dB dynamic range, Metal handheld transmitter with dynamic SM58 microphone capsule, Directional characteristic: Cardioid, 9.5"" Metal receiver, Detachable BNC antennas, Ethernet connection for monitoring and configuration of the system, Frequency transmission over infra red interface, XLR / jack output, Transmitter operates with 1.5 V AA batteries - also available with SB 900 lithium ion battery, Includes PS23 power supply unit and rack mount