<p>: Speed over the groundTRIP: Single mileage, reset after power failureODO: Accumulated mileage, save when power offCOG: heading, clockwise angle of true northNavigation pointer: 8 directions.Can freely switch kont, mph, km\/h speed unitWorking environment:Working voltage: 9~32VDCWorking current: Less than 120mAWorking temperature:-20~70 CelsiusStorage temperature:-30~80 CelsiusInput parametersGPS signal:GPS antenna length is 3 metersConnection1.Black wire: negative pole of power supply (-)2.Red wire: 9~32VDCColour:White+blackMaterial:ABSPackage Contents:1 * GPS Speedometer1 * GPS Antenna1 * Instruction manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>