4 channels. Fixed frequency.
4 controllers can used simultaneously.
Front panel ：each channel has a red RF lamp to indicate the signal.
Back panel ：2 pull rod antennas for signal receiving.
Back‐panel ：2 balanced output and 1 mixed unbalanced output.
Microphone power consumption is 30mA. 9V*1 battery,support 6 hours.
Light ring on the mic head display working status.
Working distance: 30‐60meter
It's suitable for various kinds of conference and performance occasion