"Features: 1. It uses advanced semiconductor alcohol detection technology to quickly collect breath samples and provide an estimate of blood alcohol Content (BAC). 2. It can be used in a variety of settings, including clinical testing applications and personal use. p> < p> 3. Small and portable: The digital breathalyzer has a keychain, which is small and light, does not take up space, and is easy to carry. < /p> Description: This is a digital power analyzer.Breath Alcohol Digital Breath Alcohol Test with Audible Alarm Simple way to analyze blood alcohol concentration anytime, anywhere. Features: < p>Color: Black+G ris Product size: 110*75*25mm Battery: 2" "AAA"" alkaline batteries (not included) Sensor: Oxidation based Alcohol Sensors Advanced Semiconductors < p> Range: 0.00-0.19 %BAC and 0.0-1.9 g/l (or 0,00-0.95 mg/l l BRAC) < /p> Accuracy: 0.01% BAC (0.1 g/l) < /p> < p>Package Contents: 1 x Digital Alcohol Tester < p>4 x Respiratory Inhaler Box Precautions : 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as the picture. p> 2. Due to the difference in manual measurement, please allow slight size differences."