Over 320 Degree Of Pointer Movement Adds Dial Scale And Resolution Providing The Most Accurate Reading,Modern White LED Through-The-Dial Lighting Provides Clear Visibility During Nighttime Use,Unique Three-Dimensional Dial Design Gives Added Depth And Style To Your Custom Dash,Digital Stepper Motor Electric Instruments Provide Unmatched Accuracy,Gauge Kit Includes 1/8 in. NPT Stainless Steel Pressure Transducer; 1/4 in. NPT Adapter,The Accuracy Of Digital Stepper Motor Gauges Is Increased By Utilizing A Self Calibration Sequence During Power Up,Includes Wiring Harness; Mounting Hardware; Instructions For Installation,Includes Data Acquisition Grade Solid-State Pressure Transducer Providing Unmatched Accuracy And Durability,12 And 16 Volt Compatible; Compatible w/ Nearly Every Street Car Or Race Car Electrical System,Features Metric And Imperial Scalings For Easily Relatable Readings w/o The Need For Mental Unit Conversions