Sony Bluetooth Wireless Microphone and receiver ECM-AW3. Comes with the Wireless Microphone, Receiver and Plug for Receiver to Camera. Enhances Quality of Sound from 50 meters to 150 Ft away from video recording device. Excellent Quality Purchased new for $350.00 (can meet in Duncan to view) YouTube video demonstration: https://www.youtube.com/watch?v=Vw4bCG6mtIc