Sierra 781-310-035P Lido Pro GPS SpeedometerFeatures: Dial Range: 0-35 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; White dial, black numerals, black pointer with fire-orange tip; Scratch resistant curved glass lenses, with polished stainless steel, near-flush bezels; Optional add-on eyebrow or square bezels available (see Gauge Accessories for details); White perimeter and red thru-dial lighting; Fog-Resistant Design! Complies with SAE J-1810; Voltage: 12 VDC; Current Draw: 0.15 - 0.20 A; Operating Temperature: -40C to +70C; Ingress Protection: IP65; Bezel O.D.: 3.74; Housing O.D.: 3.39; Hole Size: 3.43; Sender Code: GPS Receiver;