Gauge Series Features: • Black face gauge with magnified Tinted Lens • Brushed Aluminum Trim Ring • Gauge visor • Mounting and Installation hardware • Instructions • 2 1/6 in gauge or 52 mm in diameter

Digital Volt & Digital LED Air / Fuel Ratio Gauge Includes: • All mounting hardware • Gauge Visor • Detailed installation instructions • Reads: 8-18 Volts • Red, Yellow, Green LED's • Free Tech Support • 12 month limited warranty

This Digital LED Air/Fuel Ratio gauge has the ability to read the current voltage of the car at the same time as producing a Digital LED Read out of your air to fuel mixture. Gauge hooks directly up to your car's narrow band oxygen sensor. Gauge will read a Digital blue led read out of volt and will change to a Digital AF reading after one minute. Gauge will change back to voltage, if there is an increase or decrease in vehicles alternator output.