These instruments are illuminated using perimeter incandescent lighting. Red and green bulb covers are included to change backlight color. Additional bulb cover and LED replacement bulb options available separately.

LED digital display.
0-4v data output feed for ECU, data acquisition unit, or Laptop tuning
Auto-Dimming gauge brightness feature
Includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor
Display data in Lambda or numerical A/F ratio
User programmable range
Peak recall/memory
10:1 to 20:1 AFR Range for Gasoline Applications
Adjustable for Alternate Fuel Types (Ethanol, Methanol, Propane, CNG)
6:1 to 18:1 AFR Range for Alternate Fuel Types
User Programmable Warning Function
This product has no provision for dial illumination/backlighting.
Instrument features brushed aluminum dial in silver finish with matching silver anodized bezel.
Includes 8 ft. Wiring Harness.