Description: This alcohol detector can measure the alcohol concentration by simply exhaling, which is healthier and safer than direct contact. Instructions for Use: 1. Pre the switch once, the LCD display of the tester will light up, and at the same time, it will make a "beep" sound. 2. The state warm-up number will jump from 10 to 0, and then the state blow 10 will jump to 0 to complete the warm-up proce. 3. At the beginning of 6 seconds, put your mouth close to the breath test sensor and exhale into the sensor for 3-5 seconds. 4. The display screen can read the test results. 5. When the test results reach the following ranges, the words "Caution" and "Warning" will be displayed 0.02% BAC(or 0.2g/l) to 0.05% BAC(or 0.5g/l) 0.05% BAC(or 0.5g/l) to 0.08% BAC(or 0.8g/l) 6. When the test result reaches the following range, the words "Danger" and "Dangerous" will be displayed. over & EQUAL 0.05% BAC (or 0.5g/l) over & EQUAL 0.08% BAC (or 0.8g/l) Specification: Name: Digital Breath Alcohol Tester Display mode: LCD display Range: 0.00-1.9%BAC&0.0-1.9g/l or 0.00-0.95mg/l BRAC Accuracy: 0.01%BAC(0.1g/l) Battery: 1.5V AAA X 2 (not included) Dimensions: about 95*36*18mm/3.7*1.4*0.7in Weight: about 25 grams (without battery) color: White Package List: Alcohol Breathalyzer * 1 Lanyard * 1 Notes: Due to the lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance. Due to manual measurement, there might be a tolerance in the product size.