breathalyzer, rofeer digital blue led screen portable breath alcohol tester with 5 mouthpieces for drivers or home use, auto power off, sound alarm, current temperature display rofeer <p>the rofeer portable breathalyzer adopts professional airway design and high precision semiconductor sensor. it can quickly and accurately detect alcohol level in your body in seconds, providing you with high-precision test results.</p> <p></p> <p><br></p> <p>specification</p> <p>battery: 3×1.5v (aaa battery)</p> <p>blowing time: 3~5s </p> <p>display: lcd display with backlight</p> <p>workingcurrent: 100~200ma</p> <p>quiescent current: ≤ 40μa </p> <p>environmental temperature: 0°c ~ 45°c (32°f~113°f)</p> <p>size: about 4.84in x 2.17in x 0.75in</p> <p>weight: about 90g</p> <p>default warning value: 0.02% bac (adjustable)</p> <p>default danger alarm value : 0.05% bac (adjustable)</p> <p></p> <p></p> <p><br></p> <p>testing range:</p> <p>0~0.199%bac (deviationt ±0.01%bac)</p> <p>0~1.999‰bac (deviationt ±0.1‰bac)</p> <p>0~1.999g/l (deviationt ±0.01g/l)</p> <p>0~0.999mg/l (deviationt ±0.05mg/l)</p> <p>0~1999mg/100ml (deviationt ±10mg/100ml)</p> <p>0~1.999‰prom (deviationt ±0.1‰prom)</p> <p></p> <p><br></p> <p>package include:</p> <p>alcohol tester *1</p> <p>mouthpieces *5</p> <p>instructions *1</p> <p>black cloth bag*1</p>