ABOUT HEADSET WIRELESS SHURE BLX14/SM31:

Wireless system, SM Presenter Series, UHF wireless system with BLX1 pocket transmitter and SM31 headset microphone, Up to 7 systems simultaneously, Pilot tone, Microprocessor driven antennae-diversity, Quick-Scan function for free frequency detection, Condenser SM31 microphone capsule with 45 – 20,000 Hz frequency range and cardioid characteristic, Plastic receiver, Integrated antennae, XLR and jack outputs, Audio status LEDs, Frequency range: S8 (823-832 MHz), Headset Cannels 1, Transmission Format analog, Receiver Type Stationary, Pattern Cardioid, Earset 2 Ears, Mountable Antenna No, Charging System No, Integrated battery No