Working Voltage: DC12V<br> Signal Line Voltage: 0-1V<br> Spiral: x 1.5<br> Use Wrench: 22mm<br> Output Voltage: Maximum value 900mv/ minimum value less than 50mv.<br> How to Connect the Gauge to Sensor:<br> The white line is at heater ab<br> Black line signal line C, gray line signal ground D<br> 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.<br> One white wire connect with the car shell or battery negative pole.<br> Another white wire connect to the line of ignition switch<br> The white line is the heater and does not distinguish between positive and negative electrodes<br> Response time: (600mV-300mV) less than 100ms.<br> Response time: (300mV -600mV) less than 100ms.<br> Starting time: less than 10s<br> Heating resistance: 8.5-9.5ohm<br> Internal resistance: 200-300ohm<br> colour:Black+white<br> Material:plastic<br> Package Contents:<br> 1 x Air Fuel Ratio Gauge<br> 1 x Cable<br> 1 x O2 Oxygen Sensor<br> 1 x English manual<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.