... or table mic 3,ISO,CE,FCC,RoHS Professional 4 Channel UHF Wireless Microphone SystemFeatures:1.Four channel diversity wireless receiver2.Includes ... hours1. Frequency Range should be : 740-790MHz 2. 4ch handheld microphone with one receiver: Handheld Mic x 4 pcs; you may ... : EX W factory 305USD/PC MOQ:50sets UHF 4-CH Professional Wireless Microphone