52mm Premium EVO Wideband Digital Air Fuel Ratio kit Utilizing the latest Bosch wideband O2 sensor -5 wire heated LSU 4.9 our gauge now has the widest range 10.0:1 to 20.0:1 AFR readings on the planet. Featuring four color choices in one gauge (Red/Blue/Green/White) with a huge 52mm digital readout in the center of the gauge and a bar-graph syle LED's around the outside of the gauge for immediate reference to AFR. Features Peak Recall Fully programmable Warning feature Dimmable Daisy chain 4 color choices Free tech support Applications Universal What's in the box? 1 Prosport Gauge Bosch 4.9 5 wire heated O2 sensor Weld in Bung Wiring harness(Gauge to O2 sensor) 10 feet long Mounting cup 0-5 volt output signal for data logging Visor Warranty Prosport Limited Warranty