Specification:
Item Type: Air Fuel Ratio Gauge
Material: Plastic
Diameter: Approx. 2in/52mm
Current: IGN Maximum 0.3A ILM 0.3A
Power: DC(10-15V) 12V Professional
Fitment:
Universal for 12V Cars
It is suitable for 12 volt, 4 / 6 / 8 cylinder and gasoline vehicles, and it can change 7 colors,very gorgeous.

How to Use:
Wiring:
Red‑Positive
Black‑Negative
Green‑Signal Wire

Package List:
1 x Air Fuel Ratio Gauge
1 Cord
1 x Manual

Note:
This product does not have a sensor, and needs to be used with the narrow‑band oxygen sensor provided by the customer.