APEXI Universal Blue LED Auto Timer for NA &Turbo(Black)

1) 1.0 inch 3-digital blue LED display 2) First time to utilize O2 sensor voltage to calculate the necessary amount of after idling time automatically 3) 144 different settings to ensure the most optimum countdown setting from the widest array of vehicle 4)16 way adjustment of countdown timing from 0-10 minutes 5) O2 sensor voltage, A/F value can be displayed 6) Display A/F ration as RICH or LEAN 7) Displays battery voltage. Also warns of extremely LOW battery voltages 8) The Timer can also display critical data such as O2 sensor voltage and Battery Voltage