The Audio-Technica ATW-49CB Active Antenna Combiner Kit includes two Active Antenna Combiners designed for use with Audio-Technica 4000 and 5000 Series UHF wireless receivers and ATW-A49 LPDA antennas. Each Active Antenna Combiner is a broadband device (frequency range from 440 - 900MHz) that combines two incoming RF signals into one outgoing RF signal. One set of Active Antenna Combiners enables two sets of antennas to feed one wireless receiver or distribution system. When used with remote antennas such as the ATW-A49, the overall RF coverage area can be expanded for applications including large performance areas, stadiums, and configurable multi-use spaces such as hotel ballrooms and conference centers. Each antenna coupler is broadband device with a frequency range of 440 - 900MHz that combines two incoming RF signals into one outgoing RF signal. To compensate for RF signal loss associated with signal combining, the Active Antenna Splitters provide unity gain.The combiners are powered by 12V DC provided on the antenna cable by the associated wireless receiver or antenna distribution system that offers antenna power. A light on each active antenna combiner illuminates when power is applied.