Quality Material Made from PP, this Breathalyzer is built to last and suitable for both home and professional use. User Friendly Insert the mouthpiece, and press the power button to start. The Breathalyzer preheats in 10 seconds, then prompts you to blow for 5 seconds to display your result. It automatically turns off after 15 seconds of inactivity. Professional Accuracy Delivers BAC results with professionalgrade accuracy. Compact size: 9.8 x 4.7 x 2.31 cm (3.86 x 1.85 x 0.9 in). Voice Alerts and LED Color Display Provides clear feedback with sound alerts and LED indicators: green for standard levels (0.000.019), yellow for caution (0.0200.079), and red for drunken (0.08). Applications and use scenarios At home after social events or meals to assess readiness before driving. On the go to perform quick BAC checks before leaving a venue or starting a vehicle. In workplace safety programs or driver fleets to screen employees and enforce safety protocols.