Shure BLX14/PG85 Wireless Presenter System with PG185 Lavalier Microphone, J10 Included: BLX4 wireless receiver; BLX1 bodypack transmitter; PG185 cardioid condenser lavalier microphone with windscreen and tie clip 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)