Specification: Product Name: GPS Speedometer
Material: 316L stainless steel Bezel, Plastic housing
Colour: Black Face, Silver Frame Operating Voltage: 9~32VDCOperating current: 100m A (24V); Operating temperature: -30~+75℃ Storage temperature: -40~+85℃ Diameter: 85mm Speed Ratio Adjustment:1) Press the Set button (less than 1 second) to change the backlight
Colour: Backlight changed in sequence: red (default) greenbluewhiteyellowyellow greenorangeviolet (automatic). Automatic: As the gauges was set with the automatic, the backlight will be off for 2 seconds then lighten up, & will switchthe backlight color as above sequentially.2) Press the black rubber Mode button on the instrument for 3 seconds, then it will enter into the speed ratio setup mode, if thebutton is released for 3 seconds, it will exit the speed ratio setup mode, & automatically retain the setting data.3) As the tachometer is in setting mode, press the button to select the speed ratio required, dey as down below form. Forinstance, the pointer point at 1000rpm is for 2 cylinder engine. Note:1. Please allow 1-2mm error due to manual measurement. Pls make sure you do not mind before you bid.2. The color may have different as the difference display, pls underst&. Package Included:1 X GPS Speedometer 1 X Wiring Harness 1 X User Manual