Prosport JDM Series 52mm - Air Fuel Ratio Gauge (Narrow Band) - 216JDMAFR-R - JDM Series 52mm - Air Fuel Ratio Gauge (Narrow Band) Japanese Stepper Motor Movement White & Amber LED Backlight Double vision display feature with analog and digital readings Adjustable Warning Function with Sound & Mute Features Daisy Chain Power Supply Included Mounting Cup & Visor Full Sweep and Startup Ceremony when Powered on Series: JDM Series Type: Air Fuel Ratio Gauge (Narrow Band)Size: 52mm Range: 20~10AFR Rim: Aluminum Face: Black Face Backlight: White & Amber LED Sending Unit: Electrical Working Voltage: 12V