Shure BLX188E/SM31 Combo S8, SM Headset Series, UHF Wireless-System with 2x BLX1 pocket transmitter, 2x SM31 FH condenser headset microphone, cardioid, up to 3 Systems parallel, Pilottone, antenna-Diversity, Quick-Scan to find free frequencies, pocket transmitter with 4 Pin TQG connector, receiver with plastic housing, internal antennas, XLR- and Jack outputs, Audio Status-LEDs, frequencyrange S8 823 - 832 MHz