Hign-concerned Chemical:None New models for 2025 Use electrochemical sensors for intelligent sampling, exclude other impurities and leave only alcohol, making the detection more accurate Small and portable, test before driving to avoid alcohol residue in the body Built-in electrochemical sensor can accurately identify alcohol and impurities, accurately filter out other impurities and leave only alcohol, the test results are accurate and reliable Built-in vacuum pump,Accurately captures alcohol, More accurate results Normal (green) less than 20mg/100mL Drank driving (yellow) or equal to 20mg/100mL Drunk driving (red) or equal to 80mg/100mL Color: As Shown Material: plastic Package Contents: 1 * Alcohol Tester 1 * charging cable 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.