Shure BLX14/PG30 Wireless Headset System with PG30 Headworn Microphone, J10 Included: BLX4 wireless receiver; BLX1 bodypack transmitter; PG30 cardioid condenser headworn microphone with windscreen Power and battery status LED Adjustable gain control Quick & easy frequency matching 2 AA batteries (included) provide up to 14 hours of continuous use 300 feet (91 m) operating range (line of sight)