Blue Sea 8239 AC Digital Frequency Meter [8239] Electrical | Electrical Panels Where many other analog rudder

Where many other analog rudder angle indicators have a pointer at the twelve o'clock position on the dial

Backed by nearly 40 years of trim tab

Plugs into any standard cigarette lighter receptacle to power your GPS

No more searching for wrenches

Blue Sea 8239 AC Digital Frequency Meter [8239] Electrical | Electrical Panels Where many other analog rudderAC Digital Frequency Meter Displays frequency from 40 to 90 Hertz 3 levels of display brightness Splashproof front WARNING: This product can expose you to chemicals including di(2 ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov. Owner's Manual (pdf)