Utilizing the latest 5 wire heated 4.9 Bosch wideband O2 sensor, this gauge has a wide AFR measurement range of 10.0:1 to 20.0:1.

Featuring a clear Blue LCD readout in the center of the gauge and a bar-graph syle LED's around the outside of the gauge that change from green(Rich) to Yellow(Optimal) to Red(Lean) for immediate reference to AFR.

This is a complete Wide-Band AFR kit that includes everything needed:

• Prosport Dual Slimline AFR Digital Gauge - 52mm.
• Bosch 4.9 (5 wire) Heated O2 Sensor.
• 0-5V Calibrated AFR Output.
• Exhaust Mounting Bung.
• Instructions.
• Wiring Harness (Gauge to O2 sensor) Plug and play.
• Gauge Light Shield.