High Quality Component: and professional design; Designed with a compass for easier and quicker tuning. Powered by the receiver, nice tool for campers. Less Signal Loss:Built-in amplifier compensates insertion loss.We offer one year warranty and 24 hours customers survice~ Useful Tool:Connect to your LNB and receiver to the satellite finder to track the clearest setting for the satellite you wish to tune to. Easy To Use:With electronic buzzer, easy operation, audio tone and LCD display with backlight to show the satellite signal intensity. No External Power or batteries required: power supplied from your satellite receiver.