This little device can help you locate a satellite with your dish and satellite receiver. Just connect the module in-line with the dish, plug in the earphone (included) and move the dish around. A tone will tell you when you've found a satellite. Look at the output of the satellite receiver to tell if you have the
right satellite. The pitch of the tone varies with signal strength to let you fine-tune the aiming of the dish.
Great for RVs!