Blue Sea 8239 AC Digital Frequency Meter [8239] Camping | Accessories which includes the specific gasket

which includes the specific gasket and mounting hardware for your electronics if not supplied by manufacturer with unit

Impact resistant

Gain: 3 dB

meaning no seams to split

Blue Sea 8239 AC Digital Frequency Meter [8239] Camping | Accessories which includes the specific gasketAC 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)