The Tester is a highly accurate and reliable tester with a digital LCDdisplay, providing precise results in seconds. This professional meter features a portable design with a high precisions semiconductor , ensuring the most accurate readings and sounding an alarm when excessive is detected. Designed for private and professional use, this tester is idealfor individuals who want to ensure their own safety or the safety of their family and friend. Whether it is weddings, parties, banquets, or other social event, this compactand practical tester can be easily carried in your handbag or pocket, allowing you to confidently after drinking. With interchangeable mouthpieces that can be cleaned and recycled, this tester is convenient for multiple users and promoteshygiene. Stay responsible and test your levels withease. Measuring ranges: 0-0.199%BAC/0-0.1990‰BAC/0-0.995mg/L (The product appearance and printed words may vary depending on the batch, but this does not affect use) Colour:As Shown Material:ABS Package Contents: 1 x Breathalyzer 5 x mouth accessories 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.