Versatile LED Display Module for Cars

This useful automotive tool will allow you to monitor the battery voltage, the airflow meter, or oxygen sensor in your car. It's powered by 12V and features a 10 LED indicator that illuminates in response to the measured voltage so you can see if your O₂ sensor is causing your car to run too rich or too lean. Preset 9-12 volt, 0-5 volt or 0-1 volt ranges, complete with fast response time, high input impedance and auto dimming for night time driving.