Sierra White Premier Pro GPS Speedometer 80 MPH, Domed SSSierra's Premier Pro Series gauges feature white dials with modern black and blue graphics with superior light pipe illumination. When illuminated, black dial grads become red and pointer lights red. Features a fog-resistant design for enhanced readability.Features: Included LCD heading display to show course over ground; Speed accuracy of +/-1 MPH (once moving); Heading accuracy of +/-1 degree (once moving); Ideal for slow speed apps like pontoon boats and for high speed performance boats w/ pitot tubes; Full automotive type lighting, no ''halo'' around dial edges.; White dial, black graduations/numerals (metrics in blue), red pointer staff; Scratch resistant curved glass lenses, with polished stainless steel near-flushed bezels; Complies with SAE J-1810; Specifications: Dial Range: 0-80 MPH; Size: 3"; Sender Code: GPS Receiver;