Spanish buyers attention: if your addre includes following postal code please do not choose the Spanish warehouse. The zip code starts with 51 /52/ 07 /35 /38. Overseas warehouse cannot be delivered. Otherwise we will send the order from China warehouse. Portable Non-Contact Alcohol Breath Tester with Digital Display Screen Sound Light Prompt Alarm High Accuracy USB Powered Profeional Breathalyzer Analyzer Air Blowing Detector Feature: Accurate measurement, easy to carry, beautiful appearance, health and environmental protection Use steps: 1. Pre the key for 1 second to start the machine, the backlight and display screen will light up at the same time, all contents will be displayed, and a "drop" prompt will be given to start the machine. 2. The display screen shows "warm up" and 10 second countdown. After the countdown, a "drop" sound will prompt to enter the next stage at the same time. 3. The display screen displays "blow" and 10 second countdown. Blow air to the blowing place for 3-5 seconds. After the countdown, a "drop" sound will prompt to enter the result display, and the test results are displayed in% BAC and g / L units. 4. When the test result is le than 0.02% BAC, the green indicator is always on. 5. When the test result is greater than or equal to 0.02% ABC and le than 0.05% BAC, the yellow indicator is always on, the "caution" icon on the display flashes, and there is a slow beep tone. 6. When the test result is greater than or equal to 0.05% BAC, the red indicator is always on, the "danger" icon on the display screen flashes, and there is a quick beep tone. The test result shows that the time is 10 seconds Specification: Shell material: ABS Size: 92 * 26mm/3.62*1.02in Color: Black, Pink, Blue Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 X Alcohol Tester 1 X USB Cable