TV/Satellite combiner allows you connect a TV aerial and satellite dish through the combiner to one cable due to the difference in frequencies for both they can be sent down the same cable without interference. These can be used to input TV/Satellite send signal down one cable and then use another combiner to split the signal back out again to two devices. Specifications Signal Combiner / Duplexer 1x F-Type Female Input/Output 2x F-Type Female Input/Output DC Power pass through on satellite port Metal casing 950-2300/40-862 MHz