Artilaura Digital Gps Speedometer 2-1/16” 52Mm Mph/Km/Knot Boat Gauge With Gps Antenna Odometer For Auto Car Marine (Black)

Digital Gps Speedometer Technical Data Working Voltage: 12V/24V Operatingvoltage: 9~32Vdc Operating Current: =100Ma Operating Temperature: -20~ 70? Storage Temperature: -30~ 80? Indicating Range: 0~999 (Mph, Knots, Km/H Adjustable) Total Mileage Adjustable, Mileage Range: 0-999999 (Mi,Nmi,Km Available) Switch Unit Between Mph(Mi), Knots(Nmi) And Km/H (Km) By Backside Button Trip Counter Operation Mode: Lcd Display, Stepper Motor If Need To Change The Unit Km/H,Mph, Knots, You Can Try To Do: The Yellow Line Intermittently Contacts The Negative Electrode, Which Can Realize The Switching Of Knot, Mph, Km/H Units, And Automatically Save.