Shure QLXD14/153T H51, Digital UHF wireless system with bodypack and earset microphone, Frequency band H51: 534 - 598 MHz, 24 Bit / 48 kHz Audio signal, AES-256 encryption for secure transmissions, Up to 72 MHz switching bandwidth, 22 Compatible channels in one 8 MHz TV band, Switchable transmitter power: 1/10 mW, 120 dB Dynamic range, Metal pocket transmitter with 4-pin TQG connector, Beige MX153T earset microphone, Directional characteristic: omnidirectional, 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 with 1.5 V AA batteries - also optional with SB900 lithium ion battery, Includes a PS23 power supply and ra ack mount