Faria Beede Instruments Black 4" Speedometer 60MPH -GPS Euro. 375" (85mm)A drop in replacement for your current speedometer to match your existing instrument dash.GPS information is gathered from an internal GPS antenna. No external antenna required. The GPS Speedometer uses a highly accurate 48 channel GPS receiver. Speed data is shown by an analog pointer. This pointer is driven by a digital stepper motor for increased accuracy and minimized pointer bounce during vessel operation.Euro Black Series Specifications for Faria Beede Instruments Euro Black 4" Speedometer 60MPH -GPS: Manufacturer: Faria Beede Instruments Color: Black Features of Faria Beede Instruments Euro Black 4" Speedometer 60MPH -GPS Rugged Reliable construction Mechanical Electronic Pressure (Pitot) types available Wide range of speeds Designed for quick and simple installation 4" - Hole size: 3.375" (85mm) Package Contents: Faria Beede Instruments Euro Black 4" Speedometer 60MPH -GPS Faria Beede Instruments 32816: Black 4" Speedometer 60MPH -GPS Euro