RYSJM | Auto Car Air Fuel Ratio Gauge LCD 8 Colors Backlight Narrowband O2 Oxygen Meter Narrow Frequency / Wide Frequency Switchable

Functions:1.Peak Setting2.Color Choose3.Bright Level4.Buzzer Type5.Buzzer Level6.Open Ceremonies7.Warning Setting8.Zero position adjustmentApplication:Suitable for 12V Car universal.Feature:1, This gauge work with Stepper motor and electronic sensor.2, Stepper Motor is more fast more accurate.3, Turbo Gauge, Vacuum Gauge, EXT Temp Gauge, Oil Press Gauge, Volt Gauge, Oil Temp Gauge, Water Temp Gauge, Tachometer & Vacuum Gauge are available.4, Gauge dials are invisible while the ignition switch is off. Once the ignition switch is turned on, a clear display appears with white LED illumination. A red emitting needle pointer increases visibility.5, Backlight color: 8 colors6, Double Warning function by a meter's LED lamp and a beep7, only for 12V vehicles8, work without the control unit9, This is universal meter gauges that can fit any car10, Gorgeous Opening mode and Ending model.Package Included: （as the picture shows）1x Air Fuel Ratio Gauge