Advanced Sensors: Uses semiconductor or fuel cell sensors for accuracy.
Alarm Settings: Many devices beep or change light colors (Green for Pass, Yellow/Red for Fail) when exceeding a set limit, with 0.030% BAC often triggering a warning or "FAIL" status in personal models.
Units: Displays results in %BAC (Blood Alcohol Content), g/L, or mg/L, with 0.030% BAC being equivalent to 0.3 g/L or 0.15 mg/L.
Usage: Press power, wait for warm-up (around 10s), blow for 3-5s into a mouthpiece, and get a reading.