THE BEST OF THE BEST WIRELESS MIC .
COMPARABLE TO HIGHEND BRANDED MICROPHONE
freq 600mhz with PILOT TONE FUNCTION.
.A 'pilot tone' is an inaudible reference tone signal generated by the transmitter and broadcast alonsgide the normal audio signal. It is used by the receiver (if enabled in the receiver set up menu) to determine if a related transmitter is working. If a pilot tone can't be found, the receiver automatically mutes its output to prevent nasty noises being heard -- random noise generated by other RF signals that may be present at the time. If a proper pilot tone is found, the output is unmuted and the wanted audio is passed to the output