Model:AT-818 Breathalyzer Display:blue backlight 3-digit LCD screen Sensor:High-precision semiconductor sensor Detection Range:0.000-0.199% BAC 0.00-1.990 ,BAC 0.000-0.995mg/L (BrAC) Alarm point:0.050% BAC 0.500 ,BAC 0.250mg/L (BrAC) Accuracy:-0.01 to +0.01%BAC at 0.05%BAC Response Time: