Adjustable Scale w/ 7 Preset Ranges For Common Vehicle Types,Over 320 Degree Of Pointer Movement Adds Dial Scale And Resolution Providing The Most Accurate Reading,User Definable Resistance Setting Programmable Anywhere Between 0-280 Ohms,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,Gauge Kit Includes 20 ft. Wiring Harness; Mounting Hardware; Instructions For Installation,Digital Stepper Motor Electric Instruments Provide Unmatched Accuracy,Unique Three-Dimensional Dial Design Gives Added Depth And Style To Your Custom Dash,Modern White LED Through-The-Dial Lighting Provides Clear Visibility During Nighttime Use