Shure BLX1288/SM31 Combo Q25, SM Series Combo, Dual UHF Wireless-System, 1x BLX1 pocket transmitter, 1x SM58 handheld microphone and SM31 FH headset microphone, up to 3 Systems parallel, Pilottone, antenna-Diversity, Quick-Scan to find free frequencies, condenser SM31 capsule, 60 - 20.000 Hz, cardioid, dynamic SM58 capsule, 60 - 15.000 Hz, Cardioid, receiver with plastic housing, internal antennas, XLR- and Jack outputs, Audio Status-LEDs, frequencyrange Q25 742 - 766 MHz