Pro-Level Precision - The Professional-Grade Accuracy Portable Breath Alcohol Tester Features Advanced Sensor Technology For Dependable Bac Readings. Breath Alcohol Tester: Active Blow Detection, If the continuous blowing is less than 3 seconds or the blowing is wrong, the blowing failure be automatically prompted. Blow tube light design, the test results are intuitively visible Drunk driving red light, drunk driving yellow light, not exceeding the standard green light Precise passing gas volume and gas path design Note:This product does not contain batteries, so you need to equip yourself with 3 x AAA batteries. High-precision sampling system The latest high-precision sensor The latest AI algorithm Active Blow Detection Instrument-level circuit design Dual-core processor LED result display Results in seconds Storage history Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color:Black Material:plastic Package Contents: 1 * Portable 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.