Shure BLX14R/SM31 Q25, SM Presenter Series, UHF Wireless-System with BLX1 pocket transmitter and SM31 headset microphone, up to 12 Systems parallel, Pilottone, antenna-Diversity, Quick-Scan to find free frequencies, condenser SM31 capsule, 45 - 20.000 Hz, cardioid, 9,5" 1U receiver with metall housing, removeable BNC antennas, XLR- and Jack outputs, LCD with HF- and Audio level, frequencyrange Q25 742 - 766 MHz, incl. rackmountkit