Azden 1201BT body-pack transmitter is designed to work with either the 1201URX/VM, 1201URX/AB or 1201URX/Si Azden 188-channel professional on-camera UHF receivers. The 1201BT is a frequency-agile transmitter with 188 on-board user selectable UHF frequencies, so you'll always find a clear channel. This camera-mount wireless microphone system uses new UHF frequencies (638.125 to 661.875 MHz) to avoid interference from HDTV broadcast transmission.
Compared to the Azden 1000BT transmitter, the 1201BT features reduced current-drain for improved battery life. Thanks to redesigned circuitry, the 1201BT operates for 6-8 hours using two AA Alkaline batteries. The 1201BT also features a large LCD readout.