Description: 【Professional Accuracy】: This Breathalyzer delivers accuracy BAC results for professional grade accuracy, with a compact size of 9.8x4.7x2.31cm/3.86x1.85x0.9inch 【User Friendly】: Insert the mouthpiece, and press the power button to start. The Alcohol Breathalyzer preheats in 10 seconds, then prompts you to blow for 5 seconds to display your result. It automatically powers off after 15 seconds of inactivity 【Compact and Portable】: Weighing only about 70g, this Personal Alcohol Tester is lightweight and easy to carry in your car, bag, or pocket, suitable for use at bar, parties, banquets, or social gatherings to ensure secure driving after drinking 【Voice Alerts and LED Color Display】: The Alcohol Detector provides clear feedback with sound alerts and LED indicators: green for standard levels (0.00-0.019), yellow for caution (0.020-0.079), and red for drunken (≥0.08) 【Quality Material】: Made from ABS, this Alcohol Test Tool is built to last, ideal for home or professional use Specification: Needing install 3 1.5V AAA batteries (not included) Size Chart: 9.8cmx4.7cmx2.31cm/3.86inchx1.85inchx0.91inch Package Includes: 1 Breathalyzer Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.