Sierra 781-627-120P Black Premier Pro Series SpeedometerFeatures: Dial Range: 0-120 MPH; Size: 3"; Included LCD heading display to show course over ground; Use our GPS antenna (sold sep) or connect to an existing NMEA 0183 GPS device - connectors included; 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.; When lit, white dial grads become red, pointer lights white; Black dial, white graduations/numerals (metrics in blue), white pointer staff; Scratch resistant curved glass lenses, with black, near-flush bezels; Optional add-on eyebrow or square bezels available (See Gauge Accessories for details); Fog-Resistant Design! Complies with SAE J-1810;