Q. What voltage is SirenSat OffShore compatible with? Customer Support Manager September 10, 2020 14:38 Follow 8-22volts - 24 volt systems should not be connected to the SirenSat antenna. Related articles Q. I have plugged in my NGT-1 but do not see any data in the app, what do I do? Q. How can I monitor if my engine is on? Q. Does the cellular antenna have to be connected to Siren 3 Pro? Q. How strong is US Coverage? Q. I am not seeing my events log in my Siren Marine App when one of my sensors are triggered and the sensor tile lights up orange. What should I do? Comments 0 comments Please sign in to leave a comment.