ECB-1: (BOOST) Ethanol Content & Air/Fuel Ratio Gauge (Four-in-one, ethanol content %, fuel temp., vacuum/boost press., and wideband O2) The Ethanol Advanced gauges combine our patented DirectDigitalO2 sensor control technology with application specific sensors, an OLED display, and a sophisticated ethanol content sensor that also measures fuel temperature. These capabilities allow the user to monitor and capture critical metrics for accurate and reliable tuning while operating with high ethanol content fuel. The Ethanol Advanced gauges offer the looks, safety and performance enthusiasts demand! Four-in-one, ethanol content percentage, fuel temperature, boost pressure, and wideband air/fuel ratio gauge Boost Vision - a real-time calculated approximation of your ECUs boost limit based on current ethanol content percentage OLED user configurable display (one, two, or four channel viewing modes)Ethanol %, Vacuum/Boost, Target Boost, Peak Boost, Fuel Temp, Air/Fuel ratio °F or °C, AFR o