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 HSU482 Series UHF wireless microphone system includes one receiver and two handheld transmitters, each of the transmitters have 48 selectable channels to match with those of the receiver for easy system expansion and minimized interference. The handheld microphone has a back-lit LCD display that shows you channel #, frequency and battery strength, you can adjust the frequencies by pressing the "up" and "down" buttons. To select channels on the receiver, you can either do it manually or press the "Auto" button on the receiver so it will scan the channels automatically and lock on the channel that matches the frequency on the transmitter. This system has a total of three audio outputs, one of which is mixed output with standard 1/4" jack, the other two are bala Type: Microphone System Features: PLL Synthesized UHF 600 MHz System with Auto-Scan Frequency Pairing. Long-range transmission, up to 300 feet. Rack-mountable and multiple frequency available for easy system expansion. Plastic carrying case provides excellent protection and portability. Parts: One year manufacturer's warranty Labor: One year manufacturer's warranty