Features:<br> 2-in-1 car meter shows the air-fuel ratio and battery voltage, accurate and easy to view.<br> Made of high-quality plastics, with nice durability, strong and anti-aging.<br> It can help improve vehicle performance and make driving safer.<br> 52mm/2in universal gauge fits for 12.0V motorcycle, car, truck, gasoline engine.<br> Easy to install and use, reliable quality, is a nice modification accessories.<br> Specifications:<br> Color: Black<br> Material: Plastics<br> Working Voltage: 12 V<br> Signal Line Volatge: 0-1V<br> Output Voltage: Max. Value≥900mV / Min. Value≤50mV<br> Response Time: (600mV-300mV)≤100ms<br> Response Time: (300mV-600mV)≤100ms<br> Starting Time: ≤10s<br> Heating Resistance: 8.5-9.5Ω<br> Internal Resistance: 200-300Ω<br> Mounting Diameter: 52mm/ 2in<br> Item Size: 57 * 57 * 40mm/ 2.2 * 2.2 * 1.6in<br> Package Size: 150 * 100 * 50mm/ 5.9 * 3.9 * 2.0in<br> Package Weight: 300g/ 10.6oz<br> Packing List:<br> 1 * Air Fuel Ratio Gauge Kit1<br> 1 * Oxygen Sensor<br> 1 * Gauge Cable<br> 1 * Manual