Hisonic UHF dual-Channel Wireless System provides you with proven performance and durability in a variety of settings, from churches to nightclubs to gymnasiums, from concert halls to broadcast booths and stadiums. Each HSU600 Series UHF wireless microphone system includes one receiver and two belt-pack transmitters, each transmitter has 16 selectable channels to match with those of the receiver for easy system expansion and minimized interference. You choose choose either the headset or the lapel microphones to use with the transmitters depending on your personal preference. For your convenience, this system is built-in with infrared frequency pairing technology, to match the channels on the transmitter and the receiver, all you need to do is to press the "ACT" button on the receiver and place the transmitter in front of the receiver, then the transmitter will pick the matching frequency and lock it. Unlike some other systems, which use 3.5 mm jack to connect the belt pack and the lapel or headset microphone, this system uses mini size XLR connectors to do the job, this feature greatly enhances the system"s overall performance as well as its durability. This system has a total of three audio outputs, one of which is mixed output with standard 1/4" jack, the other two are balanced individual XLR outputs for each channel.