1.This product is suitable for 12V power supply, and it is strictly prohibited to use power supply exceeding 18V.

If the use of a power supply exceeding the voltage of this product causes it to burn out, it will not be within the scope of warranty and free return and exchange.

2.The red wire is connected to+12V, and the black wire is connected to the negative electrode.

3. Other connections should be connected using plug and play connectors, and it is strictly prohibited to damage or replace other connectors for use.

4.1:0xygen sensorinstallation:at thefrontend ofthe three-way catalytic converter 100-300mm,drill a 21-22mm hole, weld the bung into the hole, and screw theoxygen sensor into the bung.The installation angle ofthe sensor should be at least10°from the horizontal.The electricalconnection should upward（Pictures are in the detailed introduction）

5.The UGEO Air Fuel Ratio Gauge is equipped with a 4.9 LSU sensor that provides real-time feedback with high accuracy and fast response time. It responds instantly to every 0.1 change in air/fuel ratio, giving you more time and accurate information when making adjustments.

Packaging:

1×Wideband Air/Fuel Ratio Gauge 1×LSU4.9 UEGO Sensor

1×9.8ft UEGO Sensor Wire

1×O2 Sensor Bung

1×Controller Box

1×3.2ft Controller to Gauge Wire Harness

1×3ft Controller to Power Supply Wire Harness

NOTE:

(1)It would be highly appreciated if you might contact us first once you have any problems concerning the items.  And you can expect all the issues would be resolved ASAP!

(2)Please let us know before you send us the neutral/negative feedback that wont help to finish the issues.  And I will definitely try my best to provide the best solutions which would meet our satisfactory!