GReddi Sirius OBD2 Gauge LCD 74mm Turbo Speed Volts Water Oil Temp Fuel Pressure RPM Air Fuel Ratio Exhaust Meter Attention must be paid : (A car needs a controller)Main Features * 10 functions can be displayed . *The opening mode and ending mode can be selected from two variations . * A warning value ( arbitrary ) can be set and the warning buzzer can be selected from three variations or turn of * The buzzer can be selected in three loud levels *7 Colors backlights can be selected * Flat glass , high-definition scale and long , narow pointer provides accurate indication and high visibility . * Data obtained during ding ( peak value and wamning value ) can be stored u and the peak value can be reviewed and cleared Product Specifications * Power-supply voltage : 10V to 15V DC ( 12V vehicles only ) * Current consumption : + B line : MAX 120mA *IGN line : MAX 120mA *ILM line : MAX 2mA Warning *This product is designed for use on 12 vehices . Do not install this product on vehicles with 24 system . * Do not disassemble or modify this product . Such actions will not only void the warranty but also damage or destroy the produ * Do not perform installation of this product immediately after the engine has been switched off . The engine and exhaust system are extremely hot at this time and can cause burns if touched .