Sony WCS999 Wireless Camcorder Microphone for DCR-DVD101/201/301 & DCR-HC20/30/40/65/85 For use with video camcorders, portable audio recorders Transmission range up to 150 feet, depending on conditions 900 MHz FM transmission for high-quality sound Three channels with selector switch for low interference Complete kit includes: lavalier mic, transmitter, receiver and monitoring earphone