Boat speedometers are among the essential tool on your dashboard. The SPEEDOMETER (F34611) is a Faria Beede Professional Red Series featuring a perimeter-lighted Black dial with sleek Red and White graphics, Black aluminum bezel, a tear-drop White indicator, and a flat glass lens. The Pitot tube-type speedometers work by pushing water pressure into the pitot tube, keeping track of your pace on waterways, and allowing you to indicate the duration of the journey. This pressure is then transferred through flexible tubing to the bourdon tube motion inside the speedometer head, in which the movement process converts it into a speed reading. Key Features: Scratch-Resistant Flat Lens The bezel is in Black Aluminum. The Dial's Perimeter Lit up with LEDs. White Tear Drop Pointer 4" - Hole Size: 3.375" (85mm) 4" Red Professional Speedometer (60 MPH) Specifications: SKU: F34611 Weight: 0.54 LBS Gauge Type: Speedometer Gauge Size: 4" Series: Pro Red Voltage - Input Range (Volts): 12/24 V Brand: Faria Condition: New Note: The Gauge Cover and Pitot tubes are available for purchase separately.