Features Digital Display: The alcohol tester uses numbers to display the results of alcohol concentration, and has a prompt sound, which is clear and intuitive. Strong Functions: The alcohol tester has the function of automatic shutdown and power saving, selectable alarm points, and has a quick response machine recovery speed. ABS Housing: ABS has good wear resistance and light weight, which saves effort when users hold it with single hand. Replaceable Mouthpiece: The mouthpieces on the alcohol tester are replaceable, and 5PCS mouthpieces are delivered in our kit, which you can replace by yourself. Wide Application: Alcohol detectors are widely used in drunk driving, alcohol production, safety inspection, fire safety, express delivery, coal mines, fleets, enterprises, and construction sites. Specification: Item Type: Breathalyzer Material: ABS Model: AT 818 Battery: 3 x 1.5V AAA batteries (excluded) Application: Alcohol detection Detection range: 0.000-0.199%BAC, 0.000-1.990%BAC, 0.000-0.995mg/L (BrAC) Package List:1 x Breathalyzer 1 x Instruction5 x Mouthpiece1 x Storage Bag Note:1. Do the test after drinking alcohol for at least 20 minutes, as it takes about 20 minutes for alcohol to be absorbed from the digestive system into the bloodstream. Tested immediately after drinking, the results can only reflect the alcohol concentration in the mouth at that time, not the alcohol concentration in the blood.2. In order to make the test results accurate, please wait 20 minutes before taking the test after drinking. The test time is preferably more than 3 minutes from the last test.3. Smoking and eating are strictly prohibited within 20 minutes before the test.4. Do not wipe the product directly with chemicals or corrosive solution to prevent liquid from flowing into the blowpipe.5. If the test is performed under low power, there will be a certain deviation between the test value and the real value.6. It is strictly forbidden to place and use it in a closed environment with corrosive gas or air pollution such as pigments, pesticides, and alcohol.7. Unauthorized repair and damage to the internal parts will lead to product failure. Package List 1 x Breathalyzer 1 x Instruction 5 x Mouthpiece 1 x Storage Bag