Programmable Boost Cut Safety Using Air/Fuel and Pressure Ref.,100 pct. Digital Wideband Air/Fuel Ratio Technology,Controller and Display House In 52mm [2-1/16 in.] Dia. Gauge Body,Patented DirectDigital Wideband Sensor Control,4 BAR MAP Sensor- Pressure Range -29 inHG to 43.5 PSI- -1 to 3BAR,Incl. High Resolution Solenoid,Interchangeable Bezels- Black and Silver Included,No PC Required For Configuration,Programmable Solenoid Duty Cycle w/Separate Gain Control Function,All-In-One- Intelligent Boost Control/Wideband AFR Gauge,OLED User Configurable Display- Boost- Shift Light- AFR,Interchangeable Faceplates- Black and White Included