This satellite finder meter has an audio tone that helps the user to align their satellite antenna properly. As the satellite antenna is turned to various positions, the signal finder meter measures the strength of the signal and converts the strength to an audio tone. The loudness of the audio tone allows you to position the antenna into the best position. This works with multiple TV Dish Systems without an automatic satellite tuning capability. Meter with audio tone helps user align satellite antenna to signal. Great for remote satellite antennas. Great for RVs and other mobile satellite setups. Audible tone lets you know when you are on the bird. Powered by satellite receiver. Variable gain control lets you fine tune the satellite for the best possible alignment. Frequency Range: 950-2050 mhz. 1 per package.