: Speed over the groundTRIP: Single mileage, reset after failureODO: Accumulated mileage, save when offCOG: heading, clockwise angle of Navigation 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 metersConnection1Black wire: negative pole of supply (-)2Red 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.