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Portable Breathalyzer Operating Instructions 1. Please install 3 pcs AAA alkaline batteries (not included) once you prepare to test 2. Insert 1 pc mouthpiece 3. Press the power button for 2 seconds to start the alcohol tester 4. Choose the testing mode if you want to change the factory default setting (Detection range: 0.000-0.190%BAC / 0.000-0.950 mg / L) There are 6 different testing modes: %BAC-US, g/l-EU, mg/L BRAC-JP, mg/100ml-CN, ‰BAC-RU, ‰prom-PL 5. Waiting 20 seconds for warming-up, then blow with the tester for 5-6 seconds, the result will be ready after 3 seconds, and it will be displayed on the LCD screen for 15 seconds 6. When the test result is higher than 0.05% BAC / 0.5 ‰ BAC -The factory default setting, the red light flashes and a continuous drop sound is emitted to remind the driver Features: ¤ Auto-calibration & sensor fault self-checking system ¤ Fast response time ¤ Accuracy +/- 0.010% BAC (0.1 g/l) ¤ Detection range: 0.000-0.190%BAC / 0.000-0.950 mg / L ¤ 6 different testing modes: %BAC-US, g/l-EU, mg/L BRAC-JP, mg/100ml-CN, ‰BAC-RU, ‰prom-PL ¤ Recording recent 32 times testing results ¤ Operating environment 10C – 40C (50F – 104F) ¤ Warmup time =20 seconds Response time = 3-5 seconds ¤ Battery life = approximately 200 tests Packing contents: Professional Breathalyzer Alcohol Tester x1 User manual x1 Mouthpiece x5 Carrying String x1 Warranty 12-month new replacement warranty; If you meet any problems during using our breathalyzers, please feel free to contact with us, we will try our best to meet your satisfaction;