... 3,ISO,CE,FCC,RoHS Professional 4 Channel UHF Wireless Microphone SystemFeatures:1.Four channel diversity wireless receiver2.Includes Four UHF Wireless Microphones3.200 adjustable frequencies with DPLL ... /N )Spurious rejection≥75 dBSensitivity adjustment range12-32dBVMaximum output level+ 10 dBVTransmitter Output powerHigh:30mW; Low:3mWSpurious rejection-60dBVoltageTwo AA batteriesCurrent ...