Shure BLX188/MX53 Combo Q25, SM Series Combo, Dual UHF Wireless-System, 2x BLX1 pocket transmitter, 2x MX153 earset microphone, up to 6 Systems parallel, Pilottone, antenna-Diversity, Quick-Scan to find free frequencies, condenser MX153 capsule, 20 - 20.000 Hz, omni-directional, receiver with plastic housing, internal antennas, XLR- and Jack outputs, Audio Status-LEDs, frequencyrange Q25 742 - 766 MHz