3-3/8" (85mm) OceanLink GPS Speedometer 0-70 - White Dial & Bezel OceanLink NMEA 2000 Certified 0-70 kn/mph/kmh GPS Speedometer. Features integrated GPS chip and requires no external antennae. Features white dial and white bezel.OceanLink Technical Information:1x connector NMEA 2000®Reverse polarity protectionFront & rear side protection rating IPX5Operating temperature range -20 °C / +70 °C