Shure BLX14 Headset System W/PGA31

Includes BLX4 wireless receiver, BLX1 body pack transmitter, PGA31 headset microphone, power supply, clothing clip, windscreens, and user guide.
Power and battery status LED
Adjustable gain control
Quick & easy frequency matching
300 feet (91 m) operating range (line of sight).Hold the microphone within 12 inches from the sound source