Feature: 1. 100% New in Box & Good Quality. 2. This is One Gauge With Two Color (Blue & Red) 3. Add a racing look and feel to your ride,High quality and light weight. 4. Smoke tint lens during the day,Clear and bright LED Display during the night. Fitment: Fit most of 12Volt gasoline vehicle, Fit 2"or 52mm Diameter Gauge Pods holder Oxygen Sensor Specification: OEM:0258006028 Working Voltage: DC12V Spiral: M18*1.5 Use Wrench: 22mm Output Voltage: Maximum value 900mv/ minimum value 50mv Response time: (600mV-300mV) 100ms Response time: (300mV -600mV) 100ms Starting time: 10s Heating resistance: 8.5~9.5 Internal resistance: 200~300 The instruction of the Oxygen Sensor: The white line is at heater ab Black line signal line C, gray line signal ground D The green wire of the instrument is connected with the black wire of the sensor. The gray line is connected to the negative pole of the battery. One white wire connect with the car shell or battery negative pole. Another white wire connect to the ACC line of ignition switch The white line is the heater and does not distinguish between positive and negative electrodes Package Included: (as the picture shows) 1x Air Fuel Ratio Gauge Package Included: (as the picture shows) 1x Air Fuel Ratio Gauge 1x Sensor Package Included: (as the picture shows) 1x Sensor OR 1x Gauge Cup