•It will give you an alarm by exuding the beep when the result is higher than 0.050% BAC, 0.500‰ BAC or 0.250mg/L(BrAC) •The accurate reading and big display screen can avoid any confusion and keep you safe to go, automatic shutdown •Just press the power button for 3-5 seconds to start the professional breathalyzer, wait for 15 seconds for warming-up, then blow with the tester for 5-6 seconds •This professional alcohol breathalyzer just needs small space, can be easily carried in your wallet or pocket everywhere •Designed to meet the rigorous standards of expert alcohol screeners, from roadside law enforcement to hospital employees & treatment professionals •Powered by 3 x AAA batteries (batteries not included) Specifications: •Detection Range: 0.000-0.199% BAC; 0.000-1.990 ‰ BAC; 0.000-0.995 mg/L •Alarm Point: 0.050% BAC; 0.500 ‰ BAC 0.250 mg/L BrAC •Accuracy: ±0.010%2 BAC; ±0.100 ‰ BAC; 0.250mg/L •Response Time: •Warm-up Time: •Working Current: ≤120mA •Working Environment: 10 Celsius degree ~50Celsius degree •Display: Blue backlit 3 digital LCD display Package included: •1 x Breath Alcohol Tester Trace Breathalyzer Accurate Digital Display •1 x Bag •1 x Manual