The Azden 15BT is a Belt Pack Transmitter with Lavaliere Mic. This compact wireless camera-mount system uses new UHF frequencies to avoid interference from HDTV transition. The 105 series system features include 91 user-selectable UHF frequencies (566.25 - 589.75 MHz), a pivoting high gain antenna, headphone output with volume control and a power-on/receiving signal LED. The operating range is 200-300 feet and it is powered by two AA batteries. It is supplied with a mini-jack cable.