Incl. 1/8 in. NPT Stainless Steel Pressure Transducer,Incl. 1/4 in. NPT Adapter; Wiring Harness,Traditional Incandescent Lighting Illuminates Perimeter Of Dial,Incl. Data Acquisition Grade Solid-State Pressure Transducer,Acquire Data For Later Review,Accuracy of Digital Stepper Motor Increased By Self-Calibration,Warning Notification to Highlight Need For Driver Attention,Provides Unmatched Accuracy And Durability,Incl. Bulb And Socket Assembly; Red/Green Bulb Covers,Set Custom Alerts Specific To Your Vehicle,One-Touch Peak Recall,12 And 16V Compatible