[Range Of Compatibility] The digital satellite finder is compatible with for DirecTV, and free satellite systems, etc. Comes with a compass for easier and faster adjustments. [Buzzer And ATT Function] Digital satellite signal finder has a buzzer and attenuation (ATT) function, and the signal strength meter will have a pitch tone (the higher pitch of the strobe signal) on the buzzer. [Easy To Use] This digital satellite signal meter with electronic buzzer, easy to operate, attenuation, sound tone and backlight, built in amplifier to compensate for insertion loss. [Display Performance] Satellite signal finder supports sound with analog signal strength meter display, illuminated meter display for night use. Display is clear and easy to read. [Connection Instructions] Connect the satellite detector to your LNB and connect the receiver to the strength finder TV antenna to track the clearest setting of the satellite you wish to tune to.