Blue Sea 8239 AC Digital Frequency Meter [8239] Electrical | Electrical Panels Backed by nearly 40 years

Backed by nearly 40 years of trim tab

Plugs into any standard cigarette lighter receptacle to power your GPS

Display Micro display Polarity White hot or black hot Brightness Adjustable

audio and visual alarms

Blue Sea 8239 AC Digital Frequency Meter [8239] Electrical | Electrical Panels Backed by nearly 40 yearsAC 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)