AEMs E85 wide-band air/fuel gauge unites unsurpassed accuracy, speed and control with an easy to read, analog interface. The AEM wide-band also offers a 0-5 volt analog output for use with data loggers and virtually any engine management system, such as the AEM, EMS or FIC. The system features a Bosch sensor with an accuracy of .1 AFR, making it among the fastest and most accurate wide-bands available. The backlighting is user adjustable to 7 colors, (white, blue, green, red, orange, light blue, and aqua), allowing users to easily match the wide-band gauge to most factory gauge clusters, and both the white and black faceplates come with the gauge and are easily interchangeable. Adjustable backlighting through a dial on the back of the gauge. Two status lights for error detection and operating status. 320 degree viewing area for unsurpassed resolution.