AUTOMETER PHANTOM AIR FUEL RATIO MONITOR, SOLD INDIVIDUALLY -- 2.06 in. diameter; Lean-rich air to fuel ration display range; Black display gauge bezel; LED digital display gauge type; Full sweep; Electric; White display gauge face; Red number display; Includes 8 ft. wiring harness, custom tuned AFR resolution Bosch LSU, and sensor display data in lambda or numerical A/F ratio; Features auto-dimming gauge brightness; 10:1 to 20:1 AFR range of gasoline applications and 6:1 to 18:1 AFR range for alternate fuel types; LED through the dial lighting.