It is one of the most useful tools that you can own to set up your dish. This device connects between your satellite dish and your receiver and allows you to find the satellite without having to use the meter on your TV. No more having to wait for a buddy to help or having to turn the TV volume up really loud and make several wasted trips back and forth from TV to roof. The SF-95 is great for adjusting and peaking the signal strength on a satellite dish. No batteries required; it is powered by the receiver. The meter is completely lighted and emits an audio tone when a satellite signal is detected.