Shure SLXD2/SM58 S50, Digital UHF Handheld Transmitter, Frequency ranges: 823 - 832 MHz and 863 - 865 MHz, Dynamic SM58 microphone capsule, Microphone directional characteristic: Caridoid, Microphone frequency range: 50 - 15,000 Hz, 24-Bit / 48 kHz digital audio, 120 dB dynamic range, Switchable transmitter