[Blow-In / Non Contact personal breathalyzers] It is a non-contact blowing breathalyzer tester without mouthpiece, which is more hygienic and healthy, and recycling is more environmentally friendly.The alcohol tester uses ABS material, which is absolutely safe. [Easy To Operate] Before use, please fully charge, turn on the breathalyzer press the on key wait 10 seconds to , then blow for 10 seconds your testing result be displayed on the HD LCD screen; the previous 50 times testing records can be tracked with this professional-grade blood breathalyzer. NOTE: Wait 20 minutes after drinking alcohol to get the most accurate results. [3-Color Screen Display Alcohol Breathalyzer] A large screen breathalyzers for alcohol,with high visibility and easy to understand and automatic shutdown, numerical readings, alcohol content and three color detection display screen. When the alcohol test results display red, a continuous alarm () be issued to remind you. [Police-Grade Accuracy] Upgraded high-density alcohol breathalyzer tester adopts the third-generation high sensitivity aluminum sensor intelligent chip and high sensitivity sensor, which is stable and anti-interference. Accurate measurement of detection values. Within 5 seconds to accurate detection in a short period of time. you can provide results to quickly understand your status. [Portable Design] Breathalyzer adopts a portable design, small in size, , easy to carry, test anytime and anywhere, and very suitable for use in outdoor activities, weddings, parties, bars, and other places. Great for wedding, parties, feast or other social activities, ensures your safe driving after drinking. Colour:Black Material:Plastic Package Contents: 1 * Breathalyzer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.