Features: 1.High Accuracy: Using highly sensitive semiconductor alcohol sensor, accurate data, fast speed. 2.With 5 Mouthpieces: Equipped with 5 blowing mouthpieces, so the detection is safe and hygienic, and can be used by more than one person. 3.LCD Digital Display: Measurement results are clearly visible, easy to see even in dark places, clear contrast, high visibility and easy to understand. 4.Portable: Breath alcohol tester is very small and portable, can be easily carried in your pocket, convenient and practical, and can use anywhere and anytime. 5.Detailed Information: Use 2 AAA alkaline batteries (not included in the product), and can be freely replaced. The operating temperature is 5?40. Specification: Item Type: Portable Breath Alcohol Tester Size: Approx. 110 x 70 x 25mm / 4.33 x 2.75 x 0.98in Material: ABS Battery: 2 x AAA alkaline battery (Not included) Test Range: 0.00-0.19%BAC (0.0-1.9g/l) Accuracy: -0.01 ~ +0.02%BAC (at 0.05%BAC reminder point)) Preheating Time: 10 seconds (s) Operating Temperature: 5-40