A frequency-agile UHF plug-in transmitter which converts wired low
impedance mics into wireless microphones. The 63-channel
user-switchable transmitter features separate Power On/Off (with LED
indicator) and Audio Standby switches along with a mic input level
control with Peak indicator and and a switch that supplies voltage to
condenser microphones (Phantom Power). Compatible with Azden UHF
receivers, the 51XT is powered by a standard alkaline 9V battery and
uses a special "lock-down" XLR connector to secure the microphone.