1. User Friendly: Insert the mouthpiece, and press the power button. 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. 2. Voice Alerts and LED Color Display: The device 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). 3. Quality Material: Made from PP, this Test Tool is built to last, ideal for home or professional use. 4. Compact and Portable: Weighing only about 70 g, this Breath Alyzer Tester is lightweight and easy to carry in your car, bag, or pocket, suitable for use at parties, banquets, or social gatherings to ensure safe driving after drinking. Use scenarios After a social event such as a party or banquet, test your BAC before deciding to drive. While traveling to bars, restaurants, or other gatherings, keep it in your car or bag for quick onthego checks. In home or professional settings where safe driving is important, use the device to verify your alcohol level before operating a vehicle.