A compact meter to help align your satellite dish for best reception. The output from the satellite LNB is fed directly into the unit, via 1.8m (6ft.) of RF cable provided and, by adjusting the gain and sensitivity of the unit, the best position for the dish can be found. The kit includes a compass to help in the initial positioning of the dish. Supplied in a PVC storage case. The meter can be powered from the line power of the receiver via the downlead or from the supplied battery holder which takes 10 x AA type batteries (not included). This meter works with Sky Digital.