Features √High Accuracy: The Breath Tester Uses Semiconductor Sensors to Quickly Obtain Test Results with High Accuracy And Sensitivity. The Accuracy Is Up to ±0.01%Bac; ±0.1‰Bac; ±0.05 Mg/L. √Simple One-Button Operation: The Blowing Time Only Takes 5 Seconds, Very Easy to Use. Simply Insert The Two Included Aa Batteries, Turn on The Device And Start Testing. You Can Also Change The Units of Measurement And Set User-Defined Bac Thresholds for Testing. √Battery Powered: Powered by 2 Aaa Batteries (Not Included), It Can Be Tested More Than 200 Times, And It Will Automatically Turn Off after 5 Seconds of Testing. √Lcd Display: This Breath Detector Is Equipped with A Large Lcd Digital Screen with An Orange Backlight for Easy Use at Night. √Applicable Scenarios: This Portable Breath Tester Is Suitable for Home or Transportation Use, Which Can Effectively Avoid Drunk Driving And Ensure Driving Safety.. Specification: Item Type: Breath Tester Measurement Range: 0.000-0.199%BAC 0.000-1.999‰BAC 0.000-1.999g/l 0.000-0.995mg/l 0-199mg per 100ml 0.000-1.999‰Prom Alarm Level: 0.05%BAC; 0.5‰BAC; 0.5g/l; 0.25mg/l; 50mg/100ml; 0.5‰Prom Accuracy: ±0.01%BAC; ±0.1‰BAC; ±0.05mg/l Blowing Time: 5 Seconds Battery: 2 x 1.5V AAA Battery (battery not included) Package List: 1 x Breath Tester Package List 1 x Breath Tester