Sima SDW-150 Wireless Microphone for Digital Camcorders Receiver connects to camcorder using built-in shoe mount Microphone plugs into transmitter Compact transmitter clips to belt or waistband. range 30' - 40' Compact Size With Built-In Antenna & Volume Control Led Power Indicator 3040-Ft Range DigitalInterference Free Frequency Hopping Automatically Chooses The Best Band