The blue wire: Connects the button to adjust the short mileage setting to zero. 1 3 in 1 Gauge. Backlight: 7 colors backlight. Long press the button to reset.
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Marine AIS Receiver for HAR‑100 AIS Receiver Channel 10 to 35V 38400 Bps Sensitive Accurate GPS
Aliexpress UK
If you have another car products to need, we are more glad to help you! - IP67 waterproof and dust-proof grade. - P67 waterproof and dustproof grade. - Suitable for all kinds of vehicle modification.
eBay
Backlight:7 Colors Backligt. Suitable for all kinds of vehicle modification.
eBay
Indicating Range:0~6000RPM. Using stepper motor drive pointer, accurate display of the engine speed, and with the LCD display clear display mileage. Fuel Level Gauge. Water Temperature Gauge. Oil Pressure Gauge.
eBay
Switch unit between MPH(Mi), Knots(NMI) and Km/h (KM). Mileage Range: 0-999 999 (Mi,NMI,KM ). Speed Range: 0~299 (MPH, Knots, Km/h). IP67 Waterproof. Application: Motobike, Truck/tractor/E-bike, Car, LDV, etc.
eBay
Three unit can be swicthed:knot;mph;km/h. Hope it is OK for you.
eBay
IP67 waterproof and dust-proof grade. IP67 waterproof and dustproof grade. Suitable for all kinds of vehicle modification. Hope it is OK for you. Storage Temperature: -40℃ ~ 85℃. With curved glass( with anti-fog function).
eBay
Suitable for all kinds of vehicle modification. With curved glass( with anti-fog function). 1 X Instruction. Material:Stainless Steel 316L Bezel+Anti-fog Glass. 1 X Wire Harness. Indication Range: 0-60MPH.
eBay